Questions Asked on
May 2, 2011

Chemistry
What intermolecular force exists between the CH3CH2CH3 , CH4 , or the "CH3CH2" end of the ethanol molecule and the water molecules? A. dipoledipole forces B. hydrogen bonding C. London Dispersion forces D. no intermolecular interaction exists
asked by ChemLover 
Calculus/Vectors
An airplane heads due south with an air speed of 480km/h. Measurements made from the ground indicate that the plane's ground speed is 528km/h at 15 degrees east of south. Calculate the wind speed.
asked by Anonymous 
Chemistry
A solution is made by mixing exactly 500 mL of 0.178 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO, OH, and Na+.
asked by Martina 
College Chem I
Based on the types of bonding in the following compunds, explain why you would expect: 1) calcium chloride (CaCl2) to be soluble in water 2) Ethane (CH3CH3) to be insoluble in water
asked by James 
5 grade math
$3,000,000,000,000,000 how much is this in words?
asked by sammy 
Chem5
A dioxincontaminated water source contains 0.052% dioxin by mass. How much dioxin (in g) is present in 4.2 liters of this water? (Assume the solution density is 1.00 g/mL.)
asked by Ryan 
10th Grade Math
Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same total cost as before. What was the original price of each pen? There are 41 pigs and chickens on a farm. If there are 100 legs
asked by Crissy XD 
PhysicsPlease check
Electricity may be generated by rotating a loop of wire between the poles of a magnet. The induced current is greates when: a.Plane of loop makes an angle 45 degrees with the magnetic field b.The plane of the loop is parallel to the magnetic field c.The
asked by Annie 
Chem2
A reaction in which A, B, and C react to form products is zero order in A, onehalf order in B, and second order in C. If the concentration of C is increased by a factor of 4.95 (and all other concentrations are held constant), how much will the rate of
asked by Ryan 
statistics
A sample of 12 measurements has a mean of 34 and a standard deviation of 4.5. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 34 each. A. Find the mean of the sample of 14
asked by Anonymous 
Social Issues
True or False It is inevitable that parents and teachers will be in conflict.
asked by finial help 
chemistry
Data: freezing point of pure cyclohexane: 6.0 degrees celcius Freezing point of unknown soluton: 1.6 degrees celcius weight of cyclohexane: 40.0231g=0.0400231 kg weight of unknown solute: 0.4872 g K_f_ of cyclohexane: 20.00 degrees Celciusx kg/mole
asked by Tina 
trig pls.. help me
A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km. apart, beneath the rocket. The 2 tracking stations both lie west of the launching pad. at a specific moment, the
asked by Mhy 
college chemistry
a gas is collected over water at a certain temperature. The total pressure is 756 torr. The vapor pressure of water at this temperature is 17torr. The partial pressure of the gas collected is what?
asked by Kaelin 
physics
The figure below represents a periodic wave. Each increment on the equilibrium line is 760 cm. What is the wavelength for this wave (in m)?If the wave in the figure above has a frequency of 60 Hz, what is the wave's speed?
asked by Joan 
Chemistry
What is the pressure exerted by a .500 mol sample of nitrogen in a 10.0L container at 20C?
asked by Morgan 
Spanish7th gradePlease check
1.I fold the clothes. Yo doblo la ropa. 2.My padre vacuums. Mi padre pasa la aspiradora. 3. I make the bed. Hago mi cama. 4. I take out the garbage. Yo saco la basura.
asked by Sara 
Chemistry
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone how much limestone in kilograms would be required to completely neutralize a 5.2 x 10^7 L lake containing 5.0 x 10^(3) g of H2SO4 per liter.
asked by Jarred 
Chem
An aqueous KNO3 solution is made using 82.7 grams of KNO3, diluted to a total solution volume of 1.50 L. The density of this solution is 1.05 g/mL. What is the molality of this solution?
asked by Ryan 
Physics
The temperature difference in and outside an electric oven is 150oC glass fitted on the door has thickness and area of 0.2cm and 300cm2 respectively. if thermal conductivity of glass is 0.84Js1m1K1 then how much heat will be lost in one minute?
asked by sam 
calculus
The function f is continuous on the closed interval [0,6] and has values that are given in the table below. x 0246 f(x)4K812 The trapezoidal approximation for(the integral): 6 S f(x) dx 1 found with 3 subintervals of equal length is 52. What is the
asked by Kristin 
calculus
The graph of f'(x) is shown for 0=< x =
asked by Mike 
Life orientation
In 1015 lines critically discuss 5 ways in which the human or environmental problem impacts on the community
asked by Katlego 
Chem14
The reaction 2 H2S(g)> 2 H2(g) + S2(g) has Kp = 2.4 x 104 at 1073 K. A reaction mixture contains 0.146 atm of H2, 0.041 atm of S2 and 0.574 atm of H2S. What is the value of Qp?
asked by Ryan 
Chem17
Consider the following reaction at equilibrium: C(s) + H2O(g) CO(g) + H2(g) Predict which of these stresses which cause the equilibrium system to shift towards the reactant side (to the left). (There may be more than one correct answer  choose ALL of the
asked by Ryan 
physics
If the breakers at a beach are separated by 5m and hit shore with frequency of 0.3Hz, at what speed are they travelling? Please show all work, Thank you
asked by silly 
algebra
we have a cube shaped box with a volume of 125 cubic centimeters. what is the least amount of wrapping paper you would need to wrap the box?
asked by lynn 
math
Given that 2x + 7 greater than 11, x cannot be equal to?
asked by Tony 
physics
You have a tuning fork of unknown frequency. When your ring it alongside tuning fork with frequency of 360Hz, you hear beats at frequency of 2 Hz. When you ring it alongside tuning fork with known frequency of 355Hz, you hear beats at a frequency of 3Hz.
asked by silly 
physics
if you kick a football at a 30 degree angle, how many seconds is it in the air, and how high does it go
asked by johnny 
Math
Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same total cost as before. What was the original price of each pen? There are 41 pigs and chickens on a farm. If there are 100 legs
asked by Crissy XD 
Physical Science
A cyclist applies a force of 250 N to the pedals of a bicycle. If the rear wheel applies a force of 200 N to the road surface. What is the mechanical advantage of the bicycle?
asked by Rodolfo Brown 
Chemistry
how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3
asked by Sam 
Chemistry
how much heat is required to melt an ice cube that is 4.2 cm x 2.1 cm x 2.9 cm? The density of ice is 0.92 g/cm3
asked by Sam 
math
What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from left to right? Write an expression for your classmates to simplify using at least three of the operations from the order of
asked by Sammyg 
chem
Supply the missing atomic symbol to complete the equation for the following nuclear fission reaction. 1/0n +235/92U > 137/52 Te +?/?X + 2 1/0 n + energy also how do you decipher whether its 2 1/0n rather than 3?
asked by Blaze 
Thermodynamics
Sodium carbonate can be made by heating sodium bicarbonate: 2NaHCO3(s) ¨ Na2CO3(s) + CO2(g) + H2O(g) Given that ƒ¢H‹ = 128.9 kJ/mol and ƒ¢G‹ = 33.1 kJ/mol at 25‹C, above what minimum temperature will the reaction become spontaneous under
asked by Nicole 
chem
Hi in this question A typical intravenous dose of I125 for a thyroid diagnostic test is 100 u Ci. What is this dosage in megabecquerels (MBq)? (3.7 x 1010 Bq = 1 Ci) my book solved it like this: 100 u Ci * 1Ci/1x10^6uCi * 3.7x10^10/1Ci * 1MBg/1 x 10^6 Bq
asked by Blaze 
Finite Math
Timeshare sales provide an opportunity for vacationers to own a resort condo for 1 week (or more) each year forever. The owners may use their week at their own condo or trade the week and vacation elsewhere. Timeshare vacation sales usually require
asked by Hank 
cal
A Norman window has the shape of a rectangle surmounted by a semicircle (see the figure below). If a Norman window is to have a perimeter of 24 ft, what should its dimensions be in order to allow the maximum amount of light through the window? (Round your
asked by Anonymous 
Physics
A beam, B1, of mass M1 = 0.6887 kg and length L1=1 m is pivoted about its lowest point at P1. A second beam, B2, of mass M2=0.200 kg and length L2=0.200m is suspended (pivoted) from B1 at a point P2, which is a horizontal distance d=0.550, from P1. To keep
asked by Catherine 
Chemistry
What is the pH of a 0.0250 M solution of HCN? Ka = 4.0x10^10
asked by Samantha 
Science_Chemistry
A glucose (C6H12O6) solution is 2.5% glucose by mass. If the density of the solution is 1.10 g/mL, what is the molarity of glucose/water solution?
asked by Samantha 
Chem4
For the reaction A + 1/2 B > 2 C, when C is increasing at a rate of 0.018 M/s, how fast is B decreasing?
asked by Ryan 
math
You brought home 1/2 of a can of paint. You then used 2/3 of the paint to cover a table top. What fraction of a full can of paint did you use? We are multiplying fraction but do I multiply 2/3 paint by 1/1 or do I do 1/2 by 2/3
asked by Scott 
Math
A plumber spent 0.5 hours repairing a faucet.Which of the following fractions is not equivalent to 0.5? 1.1/2 2.2/4 3.3/5 4.5/10
asked by Frances 
math
I have 2 draw a set of 12 circles:Color 5/12 of set blue, 1/3 of set red, &1/6 of set green. Not grasping the concept.
asked by adam 
Math
An executive invests $24,000, some at 7% and some at 5% annual interest. If he receives an annual return of $1600, how much is invested at each rate?
asked by Maerika 
math
How do you find out what percent one number is of another?
asked by DeeDee 
Chem11
The reaction 2 COF2(g)> CO2(g) + CF4(g) has Kp = 2,001,051 at a certain temperature. What would be the value of Kp for the related reaction: 3 CO2(g) + 3 CF4(g)> 6 COF2(g)? (Enter your answer in scientific notation, e.g. 5.46e17.)
asked by Ryan 
organic chemistry
calculate the pH of a 1.25 x 10^3 M HNO3 solution
asked by kathy 
chemistry
please please please help me balance these two equations... 1. K2Cr2O7+H2C2O4.2H2O> K[Cr(H20)2(C2O4)2].2H2O+CO2 2. K2Cr2O7+H2C2O4.2H2O> K[Cr(H20)2(C2O4)2].3H2O+CO2
asked by anonymous 
Chem16
The reaction SO2Cl2(g)> SO2(g) + Cl2(g) has Kc = 2.99 x 107 at 227 degrees C. If a reaction mixture initially contains 0.166 M SO2Cl2, what is the equilibrium concentration of Cl2 at 227 degrees C?
asked by Ryan 
Chem18
Coal can be used to generate hydrogen gas by this endothermic reaction: C(s) + H2O(g) CO(g) + H2(g) If this reaction is at equilibrium, which of these stresses would increase the formation of hydrogen gas? (choose ALL of the possible answers  there may be
asked by Ryan 
calculus
find the point on the parabola (y=x^2) that is closest to the point (0.75,0)
asked by divesh 
physics
How does a wavelength of the fourth harmonic on a rope with both ends fixed compare with the lenght of the rope?
asked by silly 
Biology
Habitat limits result in a populations A)salinity B) temperature C) physical obstacles D) biogeographic range
asked by help 
mat
harvest cereal comes in boxes of different sizes.the regular box holds 7/8 pounds.the small box holds 2/3 as much. How much cereal does the small box hold?
asked by Allie 
Quick Question
"political unrest also threaten world food security for human society" What does that quote mean? Does it mean the government will not protect the food???
asked by DEE DEE 
Math
Can someone explain the sine rule please?
asked by Diana 
social issues
Parent handbooks are generally an expensive, poorly used item that could be dropped from the budget as unimportant.
asked by finial help 
math
use the shell metho to fin the volume of the solid generate by revolving the region boune by the given curves an lines about the xaxis x=3sqrty,x=3y,y=1
asked by Sheniqua 
physics
What would happen the the wavelength of an organ pipe if you fill it with helium instead of air? What would happen to the fundamental frequency? Explain Please show all work, Thank you
asked by silly 
math
use washer method y=4x+8,y=4x,x=0
asked by Sheniqua 
Physics Urgent!!!!!
OK, I know, I'm postin this way too many times but I'm halfway there now.... Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational
asked by Abia 
math
find volume using disc method y=x^2,y=0,x=0,x=5
asked by Sheniqua 
Physics Urgent!!!!!
OK, I know, I'm postin this way too many times but I'm halfway there now.... Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational
asked by Abi 
chem
A chemistry lab experiment requires 33.3 g of silver nitrate. How many grams of a 14.1% by mass solution of silver nitrate should be used? _________g Solution
asked by jan 
math
Use polynomial long division to divide 4x^3 + 24x^2 – 24x + 4 by x^2 – 5x + 1
asked by carol 
chemistry, please help!
Given: 1. Mass of oxalic acid + weighing paper 2.0355g 2. Mass of weighing paper 0.5219 g 3.volume of oxalic acid solution 250 mL 5. Volume of oxalic acid used in titration trial 1: 15.o mL Trial 2: 15.0 mL 6. Volume of NaOH solution used in titration:
asked by Tina 
Physics
A block of mass m1 is connected to an empty bucket of mass 1.35 kg by a cord over a frictionless pulley. The coefficient of the static friction between the table and the block is 0.45 and the coefficient of kinetic friction between the table and the block
asked by Mawuli 
algebra
find the length and width of rectangle ABCD...a  c = 4x and cd = x... the perimeter = 140cm
asked by keanu 
organic chemistry
can someone please explain how to indicate where a label appears in a product? for example: where the label appears in the patheway 2[14C]Glycine > AMP
asked by anony 
Math
Can someone guide me with this question? Four teachers and five students have volunteered to serve on the school's fundraising committee, which is chaired by the principal. The principal wishes to select the committee using a random draw. He places each
asked by Jay 
math
one way to resize a ring is to fill a bar into the ring.suppose a ring that is 20 mm in diameter has to be resized to fit a fingure 16 mm n diameter what is the length of the bar that should be inserted in order to make the ring fit the fingure? ( Hint:
asked by ???? 
chem
To what volume must a solution of 77.8 g H2SO4 in 479.8 mL of solution be diluted to give a 0.34 M solution? volume=_______L
asked by sam 
Calculus
Compute f'(e) where f(x)=3^(xlnx)
asked by Morris 
algebra
how do i work 2x+3[4(3x7)]
asked by kyisha 
Physics
Considering the diagram below, derive the standard formula for the second moment of area and radius of gyration for a rectangle of length L and breadth B about an axis through its centroid and parallel to the long edge.
asked by Mawuli 
chemistry
Hi in this question A typical intravenous dose of I125 for a thyroid diagnostic test is 100 Ci. What is this dosage in megabecquerels (MBq)? (3.7 x 1010 Bq = 1 Ci) my book solved it like this: 100 u Ci * 1Ci/1x10^6uCi * 3.7x10^10/1Ci * 1MBg/1 x 10^6
asked by Blaze 
math 140
BreakEven Analysis and Cost Analysis: As a firsttime homeowner, there are going to many decisions that you need to make, such as whom to hire for the upkeep of your lawn. You have just received advertisements from 2 companies in your area: Greener Lawns
asked by sharon ashford 
math
Use polynomial long division to divide 4x3 + 24x2 – 24x + 4 by x2 – 5x + 1
asked by carol 
Calculus
What is the antiderivative of the cube root of (x^2)+2
asked by Robert 
social studies
what is capitol
asked by Ann 
College math
What is the probability without replacement of drawing at least one ten (52 card deck)?
asked by Dave 
Calculus
What is the antiderivative of the cube root of (x^2)+2
asked by Robert 
math
Wats 12yds 2ft + 5yds 2ft
asked by tim 
general knowledge
how to write 2nd may 2011 in 5 letters without using numbers?
asked by pranav shah 
Math
Kelsey has 6 coins. 1/3 of her coins are dimes. The value of the dimes is onefourth the value of the coins. How much money does Kelsey have?
asked by Ashley 
maths
how to write 2nd may 2011 in 5 letters without using numbers?
asked by pranav shah 
History
What would be some main key points that would relate to the social life during the Spanish Conquest?
asked by Ann 
math
if y equals x ( x +3) then 3 y equals
asked by 5ony 
History
How did Spain's American colonies help make it the richest, most powerful nation in the world during the 16th century??
asked by Ann 
chem
How many grams of ethylene glycol, HOCH2CH2OH, are present in 5.6 gallons of a 4.81 m solution with a density of 1.98 g/mL? g
asked by jan 
Math
20=4x6x
asked by Jasmine 
Physics (please help!!!!)
Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be
asked by Abi 
English
I urgently need you to check these sentences on a trip description. I hope you can help me. Thank you. (I icluded some corrections in parentheses) 1) Our plane took off from Milan and stopped a day in Hong Kong. 2) We had the possibility to visit quickly
asked by Henry1 
Math
Hey is this right i am doing decimals please i need help and i am losing my mind lol help me please n is this right 3/5 = 8/10 = 0.8 , 2/5 = 7/10 = 0.7 , 1/5 = 6/10 = 0.6 , 4/5 = 9/10 = 0.9 , 2/10 = 5/5 =0.7 and uh hey if this is not right then can u
asked by Hailey 
physics
You tie a battery powered, fixedfrequency buzzer to the end of a string and swing it around in a large horizontal circle. Your friend stands well off to the right and listens to the tone. At which of the labeled locations will the buzzer be when your
asked by silly 
math
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.2x + 2y = 202x – 2y = 4
asked by carol 
Math
What is the answer to 3 1/4+ 1 5/6? I need this answer simplified
asked by Kerri 
physics
A 120V motor has mechanical power output of 3.20 hp. It is 81.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor. Answer: 24.6A (b) Find the energy delivered to the motor
asked by iva 
physics
You tie a battery powered, fixedfrequency buzzer to the end of a string and swing it around in a large horizontal circle. Your friend stands well off to the right and listens to the tone. At which of the labeled locations will the buzzer be when your
asked by silly 
calculus
use substitution to find the indefinite integral (x^3+3x)(x^4+6x^2+8)^9dx
asked by Amanda 
AP World History
What are some differences in North America and Latin America between 15001830?
asked by msice 
chemistry
How is salt nd hydrogen produced
asked by Anonymous 
Science
To determine the mass percentage of an iron sample, the dissolved sample [iron exists at the start as iron(II)] was titrated with potassium permanganate (permanganate forms manganese(IV) oxide.)If 22.25 cubic cm of 0.0123 potassium permanganate, what is
asked by Anna 
AP World History
what are some differences in racial ideologies in N. America and Latin America between 1500 and 1830
asked by marie 
calculus
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your decimal coefficients to four decimal places.) x/(2x^21)^0.4 dx
asked by patrick 
Spanish
please help me put these in abc order la fecha domingo marzo lunes abril viernes mayo sabado junio febrero julio septiembre agosto octubre enero noviembre lunes diciembre martes miercoles
asked by Kristiana 
Brief Calculus
Decide on what substitution to use, and then evaluate the given integral using a substitution. HINT [See Example 1.] (Round your decimal coefficients to four decimal places.) x/(2x^2 − 1)^0.4 dx
asked by Ashley 
Physics (please help!!!!)
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
asked by Bon Oncle 
Algebra
A ball is hit straight up initially with the felocity of47 ft per second The height(h) of the softball in ft above ground after(t) seconds, Using the equasion H=16 square + 47 T + 3. How long was the softball in the air before it hit the ground?
asked by Adam 
grammar and writing
what is the adverb in this sentence: pete sometimes pretends he is a strong, silent cowboy.
asked by nancy 
math
A farmer has 200 acres of land suitable for cultivating crops A, B and C. The cost per acre of cultivating crop A, crop B and crop C is $40, $60 and $80, respectively. The farmer has $12,600 available for land cultivation. Each acre of crop A requires 20
asked by TALOFA 
physics
a particle drops from the height 500m with the initial velocity at rest, and it goes into the water. a particle has a mass of 1kg. draw graphs at, vt, and st until 10 second after it hits the water. consider the air and water resistance is measured as F
asked by mike 
Math
A ramp rises 5 feet and is 13 feet long. What horizontal distance h, in feet, does the ramp cover?
asked by Nick 
physics
james made a very nice play on 13 hole on 2011 master's open. he made driver shot with initial velocity 200 m/s. the ball has a mass of 46g. its lunching angle is 28 degrees from the ground. draw the trajectory (xy graph) with and without air resistance.
asked by sam 
To SraJMcGin
*Des vacances speciales* Pensez à des vacances spéciales (ou imaginaires) avec votre famille ou vos amis. Faites une série de dessins qui montrent, en ordre, les activités spéciales. (Vous pouvez aussi utiliser des photos.) enfin, sous chaque dessin,
asked by Sydney 
Math
Please help me solve these problem i have no idea how to do this. 720m/d= ____ m/min 1.5gal/min=______ qt/h 32yd/min=_____in./s 0.85km/s=______m/min 80mi/h=_______ft/s 20fl oz/min=_______qt/day
asked by Anonymous 
human resources
o Name three selection tools that you would consider using to hire a police officer. o Choose what you think is the best selection tool or combination of selection tools in choosing the best candidate. o Detail which interview method would be most
asked by Lacy 
physics
Two point sources produce waves of the same wavelength and are completely out of phase (that is produces a crest at the same time as the other produces a trough). At a point midway between the sources, would you expect to find a node or an antinode? Why?
asked by silly 
healthcare
whatr are the general effect that changing demographics may have on the health care market?
asked by bobbi 
Science
Which radiation causes cancer? I think it is UV radiation, but I'm not sure. Also, A wave goes up and down 5 times in 10 seconds. what is the frequency of the wave in cycles per second (Hertz)
asked by Erika 
Law
Colonial punishments: what punishments do you think were the most effective in preventing further crimes, and which do you think were merely for revenge and punishment? Explain rationale.
asked by Gladys 
Calculus
Find the area of the shaded region given two points and the function y=cosx. Here's a figure (page 4 figure 7) math.upenn.edu/~deturck/m103/rogawski/chap6odd.pdf
asked by Nickie 
Computers
How does a search engine work? List the four main parts of an email header.
asked by jason 
Life orientation
5 ways in which the human problem impact on the community.provide relevant sources to support your claims
asked by seleka joseph 
math
1 minus 8 equals? is 7 the correct answer
asked by cassandra 
math
in 4a and 4c there are same no of girls total there are 56 people in both the classes if 1/3 of people in 4a and 1/4th of people in 4c are girls find total number of girls in both the classes
asked by Anonymous 
Math
How do I solve a slope equation for Y? Example: 2/3y =  1/5x
asked by Britni 
Probability!!! PLEASE help!!
A survey of Chaicago sports fans asked them 3 questions about which they prefer. Each fan must give exactly 1 answer to each question. Given a choice between the Cubs and White SOx, 40% chose cubs. Between the Bulls and Blackhawks, 57% chose bulls. between
asked by KP 
Math
Will someone help me with factoring?
asked by Diana 
chappell
what is the lattice method for 2 times 46
asked by julie 
math
7 minus 15 equals? would that be a 8?
asked by cassandra 
SCIENCE
THE PROCESS THAT USES ELECTRICITY TO DECOMPOSE CHEMICAL COMPOUNDS/ PREPARE NEW CHEMICAL COMPOUNDS
asked by SEKAMOTHO 
History
In the Spanish conquest in the Americas 14921580, were the Spaniards allied with the Portuguese?/ and who were the Europeans?
asked by Annaa 
Chemistry
what is the theoretical yield of Sodium Hydroxide
asked by bob 
geometry
Given that circle A has a radius of 52 and a radii AB and AC form an angle of 132 degrees, find the exact length of BC
asked by Lauren 
Algebra Please Help
why does the equation x^2=9 has no real solution why does the equation x^2 = 9 has two solutions
asked by Wendy Q 
Englishcry the beloved country
Cry, the Beloved Country refers at various points to the fear that exists in South African society. According to the novel, what are the causes of this fear and what are the consequences of this fear? Include evidence from the novel to support your
asked by bob 
Accounting
The SOO Company has machinery that it acquired a number of years ago at a cost of $812,000. As of December 31, 2012 the company has recorded lifetodate depreciation in the amount of $332,900. Because of changes in their manufacturing processes, the
asked by Jennifer 
Creating An Advertisment
Learned about the HBC company, and now have to do a Ad on it. What could my title be? I was trying to look for a good slogan, but I don't know. I don't really want it to be as simple as...."Work for the HBC" I've never actually done an ad before, so I
asked by Anonymous 
Chemistry
10% (m/m) Sodium Hydroxide solution, NaOH(aq) is used to break down wood fibre to make paper. A) What mass of the solute is needed to make 250mL of 10% (m/m) solution? B) What mass of solvent is needed? C) What is the molar concentration of the solution?
asked by Saman 
English
I really need to know if all the coorections are OK. It is really urgent. 1)The subject of the poem is the description of some soldiers while they are retreating through (toward) their trenches. 2)They should be young and strong but, because of their
asked by Henry1 
gen/105
• Conduct online research regarding the strongest of your multiple intelligences. Find three Web sites that accurately describe that intelligence. If you identified more than one intelligence, choose one. • Compile the following information: o Links to
asked by frank 
poetry
what is the theme in the poem phenomenal women by maya angelou
asked by lrihj 
chemistry
how much heat is required to vaporise 2 litres of ethanol
asked by liu 
history
compare democracies of jefferson and jackson
asked by Anonymous 
PreAlgebra
Okay so I have no clue how to determine if a relation is a function. Here is an example can you tell me how to determine this? D: Example: Determine whether the relation is a function. {(5,5), (2,5), (0,5), (2,5)} Thanks in advance
asked by Cheryl 
math
I need To Know how to do decimals like such as 3/5= 8/10 = 0.8 is that the right answer yes r no
asked by Hailey Robison 
math
acouple finances a house valued at $150,000. They make a $10,000 down payment and finance the remainder for 30 years at 6.8%. Taxes on the property are estimated to be $621 per year. Insurance on the property is projected to cost $685 per year. The monthly
asked by sam 
Trigonometry
Given that circle A has a radius of 52 and a radii AB and AC form an angle of 132 degrees, find the exact length of BC
asked by Anonymous 
math
I have no idea how to do this either. plz help. thank you. A couple finances a house valued at $150,000. The monthly principal and interest payment has been determined to be $599.32. Taxes on the property are estimated to be $621 per year. Insurance on the
asked by sam 
math
A person hired a firm to build a CB radio tower. The firm charges $100 for labor for the first 10 feet. After that, the cost of the labor for each succeeding 10 feet is $25 more than the preceding 10 feet. That is, the next 10 feet will cost $125, the next
asked by Anonymous 
math
A box contains 8 blue balls and 2 red balls. Three balls are selected from the box at random without replacement. Find the probability that two balls are blue and one ball is red.
asked by Suetusi 
calculus
When doing a question such as: What is the area of the region enclosed by the graphs of f(x) = x  2x^2 and g(x)= 5x? what is an easy way to tell if a function is above or under the other, so I can tell which function to put first in the integral. MUCH
asked by Jordan 
science
Which radiation causes cancer? I think it is UV radiation, but I'm not sure. Also, A wave goes up and down 5 times in 10 seconds. what is the frequency of the wave in cycles per second (Hertz)
asked by Erika 
Advanced Functions
1. Find the following quantities by hand (except for the standard deviation) Check your results with your calculator: a. Minimum b. Lower Quartile c. Median d. Upper Quartile e. Maximum f. Range g. Mean h. Mode i. Standard deviation 2. Is the mean or
asked by Anonymous 
physics
assume that the spool is a solid cylinder of radius 0.5m and a mass 5.0kg, and m=5.0kg. Find the angular speed of the spool after the mass m has fallen 3.0
asked by Anonymous 
math
I keep getting the wrong answer on this. My answers have been $243.18 and another was $247.23. ugh.. neither is right, so help plz. A homeowner planning a kitchen remodeling can afford a $200 monthly payment. How much can the homeowner borrow for 3 years
asked by frustrating 
MATH HELP
Law of Gravitation Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^11 m^3 Kg^1 s^2 Please answer
asked by Dwayne 
math
adebt of $6000 is to be amortized with 8 equal semiannual payments. If the interest rate is 5%, compounded semiannually, what is the size of each payment
asked by kristi 
Chemistry
A mixture of Nitrogen and Argon gases in a balloon exerted a pressure of 2.55 atm. Given that there were 1.0 g nitrogen gas and 3.2 g argon gas in the balloon, calculate the partial pressure of argon gas.
asked by Mandy 
physical science
The resultant vector of two particular displacement vectors dose not equal the sum of the magnitudes of the individual vectors. Describe the directions of the two vectors.
asked by Becky 
Math
The area of square JKLM is 25 square units. How many units is the length of one of the sides?
asked by MathLuv 
Physics Urgent!!!!! I really need help with this
Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be
asked by Abi 
College Algebra
Determine whether x+6 is a factor of x^3+4x^227x90
asked by Brittney 
physics
Jessica weighs 540 Newtons, According to Newton's 3rd law, if the Earth pulls on Jessica 540 N, then Jessica pulls on the Earth 540 N acting in the opposite direction. If she trips while rollerblading, why will she fall to the ground
asked by Kelli Kenyon 
math 140 math for professional
Assignment Part I: A system of equations can result in 3 possibilities: consistent, inconsistent, and dependent. Discuss each of these types of solution that can be generated, and describe the graph of each possibility. Part II: BreakEven Analysis and
asked by sharon ashford 
science
What would happen if the temperature in the Tundra drops 20 degrees farenheit?
asked by Lexi 
Chemistry
A 10.0mL solution of 0.30 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the following additions of the HCl solution: a) 0.00 mL b) 10.0 mL c) 30.0 mL d) 40.0 mL
asked by Martina 
math
Rule In Out % 24 9
asked by vick 
Chem1
The reaction N2O5 > NO3 + NO2 is firstorder in N2O5 and has a rate constant of 0.058/s. Calculate the rate of reaction when the concentration of N2O5 is 0.065.
asked by Ryan 
physics
a box containing 2.00m cubed of air is sealed at sea level pressure of 1.0 atm and a temperature of 20.0 degrees celsius. if the box is heated in an oven to a temperature of 250 degrees celsius, what is the final pressure in atm in the box?
asked by katy 
chemistry
A dentist has a 5.00 L cylinder of N2O at 20.0 atm and 25 degrees C what is the mass of gas in the cylinder
asked by tadd 
Chem3
A solution is prepared by dissolving 22.8 mL of methanol (d = 0.782 g/mL) in 100 mL of water (d = 1.00 g/mL) so that the final volume of solution is 118 mL. What is the percent methanol by mass?
asked by Ryan 
MATH QUICK THANKS
IT COSTS JUST PANTS $12.50 TO MAKE A PAIR OF JEANS. THE JEANS ARE SOLD IN STORES FOR $20.00 FIND THE PERCENT OF INCREASE THE MANUFACTORING COST TO THE PRICE IN STORES I THINK THE ANSWER IS %60
asked by Naresh Jafar 
Physics
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
asked by Bon Oncle 
home economics
In 1015 line critically 5 ways in which the human or environmental problem impacts on the community.an relevant sources to support your claim
asked by Anonymous 
physics
Electric power is found by multiplying ___ by current. volts? potential difference? The kilowatt hour is a unit for measuring ___. energy or electrical energy Thanks
asked by Sushmitha 
math
If a stone is tossed from the top of a 250 meter building, the height of the stone as a function of time is given by h(t) = 9.8t2 – 10t + 250, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to
asked by carol 
algebra
i cannot figure out how to simplify the square root of 6/7 times the square root of 1/3. please help!!!
asked by stefano 
american government
a member of Congress who votes based on the wishes of his or her constituentsoperates in which of the following roles? a.trustee b.delegate c.partisan d.politico
asked by crystal 
healthcare
How can the individual patient, the community, and society as a whole address these challenges of demographics?
asked by erika 
math
would you please check these for me thank you. +6+54= 5 also Sara only has dimes and nichels in her coin jar,they are ina ratio of 3 to 5.If she has 120 coins in the jar,how many are dimes? 45 correct??
asked by heather 
Algebra
Graph and label the following two functions: f(x)=(x^2+7x+12)/(x+4) g(x)=(x^2+3x+9)/(x1) 1. Describe the domain and range for each of these functions. 2. Determine the equation(s) of any asymptotes found in the graphs of these functions, showing all
asked by Debra 
math
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions.8x2 + 2x + 4 = 0
asked by carol 
social issues
True or False Teachers who are uncomfortable with others from diverse backgrounds should just find employment in situations where they will not have to interact with diversity.
asked by finial help 
Social Studies (quick thanks)
i need a gas or oil current event for april 3oth or may1st
asked by Satnam 
Math
How do I solve a problem like this: p^3m^2/7 + p^2m^3/21  p^4m/14 Can you please help?
asked by Diana 
Math
verify the following identity used in calculus: cos(x+h)cos(x)/h=cos(x)[cos(h)1/h]sin(x)[sin(h)/h]
asked by Monica Mosher 
Special Education
3.Given a favorite toy that Shimon manipulates or explores for 1 minute, 4/5 times. How could I change the above objective into a clear behavioral IEP goal?
asked by Marcia 
College Chemistry
Ok, so I’m working on this problem where I have to get electron per mole. I know that I need to get from Coulombs/mole of H2 all the way to # of electrons/ moles of electrons. I know that the half life reaction is as follows: 2H+ +2e >H2(g) For
asked by Tichele 
algebra 1
3(2x5)greater eqal sign x+15 here!
asked by Amber shall 
math
use the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this 3x + 24y = 24s,27x – 15y = 15 .
asked by carol 
algebra1
sqrt(5/3)
asked by stefano 
Math BOBPURSLEY HELP HELP HELP HELP
Law of Gravitation Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^11 m^3 Kg^1 s^2 Please answer
asked by Dwayne 
Creating an Advertisement
Yes Ms. Sue my target is the audience. Learned about the HBC company, and now have to do a Ad on it. What could my title be? I was trying to look for a good slogan, but I don't know. I don't really want it to be as simple as...."Work for the HBC" I've
asked by Anonymous 
math
a nickle is what percent of a dollar
asked by Tracy 
geography
how do you think the existance of nearly 3000 ethnic groups and 800 languages affects life in countries south of the sahara
asked by chris 
Poem
She was a Phantom of delight When first she gleamed upon my sight; A lovely Apparition, sent To be a moment's ornament; Her eyes as stars of Twilight fair; [5] Like Twilight's, too, her dusky hair; But all things else about her drawn From Maytime and the
asked by aria 
French
I have to construct a sentence in the passive indicative. I googled "French Passive Indicative" and everything was in Latin, not in French. Could you provide me with an example of how to write in the passive indicative?
asked by Shea 
AlgebraPlease check
We're learning arithmetic sequencesplease check this for meit's my first day calcuulating htese and I'm not sure If t(1) = 5 and t(n) = t(n1) + 2, find the first 4 terms of the sequence I think it would be 5,7,9,11 because the difference is 2 so I just
asked by Jodie 
Math/Probability
For example, you have to pick a donut from a box randomly that has the following six donuts: glazed, plain, sprinkles, double chocolate, chocolate frosted, and jelly. What is the complementary event of getting a plain donut?
asked by Ninja :P 
ELA (QUICK QUESTION)
what are some reading skills
asked by chris 
Physics
For two identical satellites in circular motion around the Earth, which statement is true? a. The one in the higher orbit has more kinetic energy b. The one in the lower orbit has more total energy c. The one in the lower orbit has less total energy d.
asked by Lola 
physics  really dnt get this at all
Will the photoelectric effect change for different targets
asked by ashley  HELP PLEASEE!!! 
maths
Can you tell me how you arrive at the answer to this question: if you multiply meby2, I become a number greater than 20and less than 40. If you multiply me by 6 I end in 8. If you multiply me by4,I end in 2.
asked by Graham 
math
The problem describes a debt to be amortized. A man buys a house for $350,000. He makes a $150,000 down payment and amortizes the rest of the debt with semiannual payments over the next 12 years. The interest rate on the debt is 11%, compounded
asked by susie 
physics
How will the current in a wire change as the wavelength of light changes? I have no idea how to do this.
asked by ashley  HELP PLEASEE!!! 
math
A couple finances a house valued at $150,000. The monthly principal and interest payment has been determined to be $599.32. Taxes on the property are estimated to be $621 per year. Insurance on the property is projected to cost $685 per year. The monthly
asked by james 
math
no idea what to do here. was in hospital and missed class for a while.any help is very welcome and apprecited. A couple finances a house valued at $150,000. The monthly principal and interest payment has been determined to be $641.85. Taxes on the property
asked by james 
vocabulary
what is self delusion? the definitions online are very confusing..Can someone explain it to me in simpler terms. Also would depression be a form of self delusion?
asked by aria 
world history
please can Someone help me on this... What was the causes, what happened, and its final outcome of the Yom Kippur war 1973?
asked by Alex 
math
another one like it. plz help me out. A couple finances a house valued at $150,000. They make a $10,000 down payment and finance the remainder for 30 years at 6.8%. Taxes on the property are estimated to be $621 per year. Insurance on the property is
asked by james 
calculus
Evaluate integral of e^x^(1/2) / x^(1/2) I've looked at the answer but I don't understand what people do in their steps. When I substitute x^(1/2) for u, I get: 2du = 1/x^(1/2) dx But what do you do with the 1/x^(1/2) dx? It just disappears in the
asked by MathisFrustrating 
math
Subtract; then reduce answer to lowest terms.5/22 1/41
asked by Anonymous 
history
what is the watergate
asked by Gloria Jackson 
math
Multiply; then reduce to lowest terms. 5 1/2.3/4
asked by Anonymous 
Chemistry
HCl(g) HBr(g) HF(g) Which of these gases has the fastest average speed? Which has the highest average kinetic energy?
asked by Mandy 
Real Estate Finance
A developer is interested in a parcel of land for a small mixed use development. Similar developments are worth $15 million and require the following sequential investments to complete: Phase Description 1 Purch. land, permitting, utilities 2 Build retail
asked by Courtney 
Science (Asap)
Month temperature(degrees fahrenheit) January 13 February 20 March 31 April 46 May 59 June 68  A.What is the range of the data for these six months? show or explain how you got your answer
asked by Frances 
eth/125
The terms Hispanic and Latino are umbrella terms for people from many different Spanishspeaking cultures in the Western Hemisphere. Although the grouping includes a wide range of cultures there is evidence of the formation of a panethnic identity. What do
asked by Sade C 
history
If you had been a voter at the time of Nixon's impeachment and resignation, how would the Watergate scandal have affected your perception of government power? Do you think the Watergate scandal has had an enduring effect on the public's perception of
asked by Gloria Jackson 
Social Issues
Another professional mandate to work with families is offered in A) most colleges of education B) the Code of Ethics C) the handbook of most programs D) the Family Medical Leave Act
asked by finial help 
physical science
If a quantity of gas in a piston cylinder has a volume of 0.9 m3 and is initially at room temperature (30°C) and is heated in an isobaric (constantpressure) process, what will be the temperature of the gas in degrees Celsius when it has expanded to a
asked by Eric 
math
k=2c9d/8
asked by kim 
Life orientation
Name two institution organization that are involved in supporting or giving redress to these disaster.Eplain how these organisation are involved in providing a safe and healthy environment.(suggestion:Find about NG0's or other organisations in your
asked by Mahlatse 
College Chemistry
can someone please explain how to indicate where a label appears in a product? for example: where the label appears in 2[14C]Glycine > AMP
asked by ana 
Science (Asap)
How are an empty glass bottle and a glass candlestick that were created from crushing and melting glass alike and different?
asked by Frances 
Chemistry
It is possible blank the products of some chemical reactions?
asked by TiJuana 
English
Thank you very much. Could you please help me check these sentences? 1)In the second stanza there is the description of a gas attack toward the trenches: a white fog raises up suddenly. While the poet manages to wear the gas mask, someone isn't fast
asked by Henry1 
English
Can you please check these sentences? I'm really doubtful about them. Thank you. 1) Look at the timetable on the departure board to see if your flight is delayed or if it is on time. 2) Then go to the checkin desk of the company you are travelling with.
asked by Henry1 
Maths
Student has a probality to pass in english is 60% , and probality to pass in english and maths is 54% , what is probality he will fail in maths
asked by indranil chatterjee 
Physics Urgent!!!!! I really need help with this
Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be
asked by Abi 
physics
A student flings a 2.3g ball of putty at a 225g cart sitting on a slanted air track that is 1.5m long. The track is slanted at an angle of 25 degrees with the horizontal. If the putty is travelling at 4.2 m/s when it hits the cart, will the cart reach the
asked by Syed 
English
I forgot to include these phrases I'd like you to check. 1) Dorian accepts to be portrayed by Basil Dorian is manipulated by Lord Henry to persue eternal beauty. 2) He loses his morality and commits bad actions becoming corrupt. When he sees the portrait
asked by Henry1 
Math
How do you find out what percent one number is of another????
asked by Hope 
physics  i need A.S.A.P
A truck traveling at a constant speed of 30.6 m/s passes by a police car which is at rest. The police officer catches up to the truck in 700 m, maintaining a constant acceleration. i)Calculate how long it took the police's car to overtake the truck speeder
asked by alya 
Physics  Momentum
A student flings a 2.3g ball of putty at a 225g cart sitting on a slanted air track that is 1.5m long. The track is slanted at an angle of 25 degrees with the horizontal. If the putty is travelling at 4.2 m/s when it hits the cart, will the cart reach the
asked by Syed 
physics  i need A.S.A.P
An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the magnitude of F is 10 N, the object just begins to slide. Determine the coefficient of static friction between the object and the
asked by mimi 
math
A homeowner planning a kitchen remodeling can afford a $200 monthly payment. How much can the homeowner borrow for 3 years at 5%, compounded monthly, and still stay within the budget?
asked by Anonymous 
math plz help me
A couple purchasing a home budget $1700 per month for their loan payment. If they have $15,000 available for a down payment and are considering a 25year loan, how much can they spend on the home at each of the following rates? (Round your answers to the
asked by Anonymous 
Chemsity
If 150 g of water is heated from 3.0 celieus to 48.0 celieus how many joules of heat are needed
asked by Trent 
History
The Spaniards in the Americas in 14921580 had dogs. when they were in battle what did the dogs do for them?
asked by Annaa 
com155
I recently decided to apply for a credit card. I have absolutly no credit. When I received my new credit card I was extremely excited. I thought I was going to be responsible with my new credit card but I was not. The first thing I did was go to the mall.
asked by melissa 
accouting
Company E December 31, 2010 Assets $42,000 $32,760 $26,880 $74,760 $114,660 Liabilities 34,440 22,932 14,515 51,584 ? December 31, 2011 Assets 45,000 32,400 ? 81,900 124,200 Liabilities ? 22,032 14,773 39,312 98,118 During year 2011 Stock issuances 6,000
asked by kelly 
11th grade chemsitry
If 150 g of water is heated from 3.0 celieus to 48.0 celieus how many joules of heat are needed
asked by Trent 
social studies
Why do people need government?
asked by Andrew 
physics
What is the period of the hand on a clock that measures the minutes? What is the frequency? Please show work, Thank you, Abbie
asked by silly 
math
next three terms 1,5,13,29
asked by amanda 
PreCalculus
Two barges are pulling a ship into the harbor. Barge A is pulling with a force of 2700N at N43 deg E, and barge B is pulling at S 50 deg E. What force must barge B exert so that the ship is pulled directly East?
asked by Joe 
Finance
Default risk) You buy a very risky bond that promises a 9.5% coupon and return of the $1,000 principal in 10 years. You pay only $500 for the bond. a. You receive the coupon payments for three years and the bond defaults. After liquidating the firm, the
asked by Anonymous 
algebra1
y=the negative square root of 2x
asked by Cambria 
math
3 fair dice are tossed. Find the probability of dice showing at most one 6
asked by yoko 
business law
1. Newman decided to rent his home at 32nd and Chestnut Streets. On January 2, 2010, he met with Kramer to discuss terms of a two year lease. Kramer noticed that there were no air conditioning units in the home. He told Newman that he would not rent the
asked by dishen 
biochemistry
can someone please explain how to indicate where a label appears in a product? for example: where the label appears in 2[14C]Glycine > AMP
asked by anony 
physics
A box of unknown mass is placed at rest at the top of a 3m long ramp that is inclined at 30 degrees, and it slides to the bottom in 2s. What is the acceleration of the box, what is the coeff of kinetic friction between the box and the plank?
asked by Anonymous 
math
Solve 12x25¡Ý3x5(x+6) using set builder notation
asked by kim 
physics
In the following list of periodic waves, which one is independent of the others: frequency, wavelength,speed,amplitude? Plese show all work Thank you
asked by silly 
world history
help please.... why was the International Organizations important In history? Whay was the Reconstruction of Europe and Japan important in history?
asked by Alex 
Math
Rule In Out % ? 24 9 25% 44 ? To find out the unknown numbers with explanation?
asked by vick 
Math
1,2,9,9,10,11,n range:13 mode:9 median:9 mean:8 Find n.
asked by Echoo 
FRENCH
*Des vacances speciales* Pensez à des vacances spéciales (ou imaginaires) avec votre famille ou vos amis. Faites une série de dessins qui montrent, en ordre, les activités spéciales. (Vous pouvez aussi utiliser des photos.) enfin, sous chaque dessin,
asked by Sydney 
stdfg
A box 5 m long, 2 m wide, and 2 m high applies 12 Pa of pressure to the table that it is resting on. How much force does the box exert?
asked by Anonymous 
Chem6
A solution contains naphthalene dissolved in hexane at a concentration of 10.40% naphthalene by mass. Calculate the vapor pressure of hexane above the solution, given that the vapor pressure of pure hexane at this temperature is 151 torr.
asked by Ryan 
Chemistry
What is the unit cell of calcium sulfide? antifluorite cesium cholride diamond fluorite graphite rutile sodium chloride zinc blende
asked by Lala 
Science (Asap)
You learned that a tree can be cut down and shaped into a bat.This is a physical change.What are some of the physical changes we find in nature?
asked by Frances 
Chem7
Calculate the osmotic pressure (in torr) of a solution containing 17.15 mg of hemoglobin (molar mass 6.5 x 104 g/mol) in 12.8 mL of solution at 25 degrees C.
asked by Ryan 
Chemistry
(5 pts) Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 60C. Pentanol is an alcohol ( a hydrocarbon with a "OH" group attached to one of it's
asked by Synthia 
Chem8
The decomposition of XY is secondorder in XY and has a rate constant of 0.00895 M1s1 at a certain temperature. If the initial concentration of XY is 0.194 M, how long (in seconds) will it take for the concentration to decrease to 0.047 M?
asked by Ryan 
5th grade math
how do you reduce 15/20 and 8/20?
asked by mary 
Chemistry
(5 pts) Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 60C. Pentanol is an alcohol ( a hydrocarbon with a "OH" group attached to one of it's
asked by Synthia 
Chem9
An aqueous solution containing 35.1 grams of an unknown molecular (noneolectrolyte) compound in 152.5 grams of water was found to have a freezing point of 1.8 degrees C. Calculate the molar mass of the unknown compound.
asked by Ryan 
Chemistry
The (water, hydrocarbon)______ creates a cage where the water is the (host, guest)______ for/of the hydrocarbon.
asked by CHEMBOB 
math
What is an improper fraction for 1 3? 7
asked by Olivia 
Chem10
The decomposition of XY is secondorder in XY and has a rate constant of 0.00599 M1s1 at a certain temperature. If the initial concentration of XY is 0.174 M, how long (in seconds) will it take for the concentration to decrease to 0.054 M?
asked by Ryan 
English
Thank you. Could you check these other sentences. 1) Dorian Gray envies the figure in the portrait becaue he wishes he would stay young forever. 2)He says he would give his soul to be young forever as the painting would be. (like the portrait?) Lord Henry
asked by Henry1 
Chem12
Calculate Kp for the reaction N2(g) + 3 H2(g)> 2 NH3(g) given that the reaction has Kc = 438,880,639 at a temperature of 265.
asked by Ryan 
physics
If acoin roll at 1.5m/s and later rolls at 4.5m/s with an acceleration of 2 meters per squared second how long will it take to come to a stop, how far will it travel?
asked by Clueless 
Chem13
The reaction CO(g) + 2 H2(g)> CH3OH(g) was studied using a 5.19 L flask and an initial condition of 26.9 g CO and 2.34 g H2. At equilibrium, the flask contains 8.34 g CH3OH. Calculate Kc for this reaction.
asked by Ryan 
algebra 1 honors
If r=5/3r+20/3, what is r? URGENT!!!!
asked by Patrick 
Chem15
The reaction CO(g) + H2O(g)> CO2(g) + H2(g) has Kc = 102 at 500 K. If a reaction mixture initially contains 0.154 M CO and 0.154 M H2O, what will be the equilibrium concentration of H2?
asked by Ryan 
life orintation
discuss 5 ways in which the human or environmental problems impacts on the community?
asked by nemutudi rotshidzwa 
statistics
the test score of 30 students are listed below. Find the Q3
asked by audrea 
Math
Find the distance between the two points of each pair. Found to the nearest tenth. (1,5) , (5,2) Is the answer 4.5?
asked by Help 
biology
What is the typical habitat of a human?
asked by monica 
Physics
For two identical satellites in circular motion around the Earth, which statement is true? a. The one in the higher orbit has more kinetic energy b. The one in the lower orbit has more total energy c. The one in the lower orbit has less total energy d.
asked by Lola 
Chemistry
Clathrate hydrate research is done by Professor Ken Janda here at UC Irvine. Look up clathrate hydrate with a general search of the internet and at Professor Janda's Research. Look at text and structures posted on the Gas Hydrate Home and the Clathrate
asked by CHEMBOB 
Chemistry
In chemistry, we did a lab using zinc as the standard and forming galvanic cells with it and another solution. We determined the voltage of each cell. The next step is to form a chart of reduction potentials using zinc as the standard (v=0). How do I do
asked by Sam 
Chemistry!!! Help!
Which of the following types of intermolecular forces tend to be the weakest? Induced dipoleinduced dipole forces Dipoledipole forces Covalent bonding Dipoleinduced dipole forces Hydrogen bonding
asked by Anonymous 
math
Can someone please solve this? x+5=12 x7=35 3=5x(83) 124+2(3x3)
asked by Robert Wayne 
Chem19
Determine ΔSuniv in J/K at a temperature of 272 K given ΔHrxn = 77 kJ and ΔSrxn = 162 J/K.
asked by Ryan 
Government
Hello, I need this question explained. You don't have to give me the answer ,but I just need a break down ..in order to know what direction i need to go in. I know what it means to be political..I guess Im just confused by the question. Please Help ! (
asked by Natalie 
Science (Asap)
Compare and contrast: When you combine two or more different substances,you get a mixture.The substance aren't mixed evenly.Their properties don't change.The substance can be separated from the mixture.For example,sand is a mixture that can be separated
asked by Frances 
world history
What trends in political organization and economic developments can be identified in 20th century world civilizations?
asked by Jamie 
physics
How does a wavelength of the fourth harmonic on a rope with both ends fixed compare with that of the second harmonic? Please show all work Thank you
asked by silly 
world history
What trends in political organization and economic developments can be identified in 20th century world civilizations?
asked by Jamie 
english
Hockenbury and Hockenbury tell us that daily hassles often cause more stress than major problems do. According to several studies, men and women report different kinds of daily stress and react to stress differently, though both experience psychological
asked by bib 
Chem20
Determine ΔG in kJ at a temperature of 261 K given ΔHrxn = 91 kJ and ΔSrxn = 151 J/K.
asked by Ryan 
science
on a train traveling at a velocity of 45 miles per hour, ally slows the train down to a stop over a distance of 600 meters. what is the acceleration? (answer in m/s squared)
asked by ty 
geometry
find the perimeter of the polygon with vertices A(5,3) B(1,0) C (3,4) D(3,7)
asked by mariah 
Chem21
Rank these gases in order of increasing standard molar entropy: Column preview Smallest S Br2(g) Second smallest S F2(g) Second largest S I2(g) Largest S Cl2(g) Matching pairs Smallest S Second smallest S Second largest S Largest S
asked by Ryan 
Physical Science
Hi... well anyways so I am in 7th grade but I'm taking 8th grade science...I think...I know for sure that I am in Accelerated 7th grade science so if that helps at all, there you go:) Back to the subject I'm really confused with acceleration calculation
asked by Pate 
Health Information Technology
What does the term "ethics" mean? With what ethical standards must students comply? Are ethical standards higher for those in the medical profession? Should they be? Why or why not?
asked by Brea 
Math
(u+4)cubed + 80=0
asked by B 
Chemistry
If 16.5 g of oxygen gas is required to inflate a balloon to a certain Volume at 26.5 degrees Celcius, what mass of oxygen gas is required to inflate the same balloon to the same volume and pressure at 10.0 degrees Celcius?
asked by Amanda 
math
Given the quadratic function f(x) = x2 – 18x + 81, find a value of x such that f(x) = 16.
asked by carol 
math
Joe has a collection of nickels and dimes that is worth $8.55. If the number of dimes was tripled and the number of nickels was decreased by 2, the value of the coins would be $23.45. How many nickels and dimes does he have?
asked by carol 
physics
Sound waves in iron have a speed of about 5100 m/s. If the waves have a frequency of 400 Hz, what is their wave length? I am thinking it is 12.75 v/f 5100/400 is 12.75 m Is this correct. Thank you
asked by silly 
chem
What is the pH of the solution created by combining 2.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? I understand how to find the pH for the NaOH + HCl solution. However, I'm not sure how to find it
asked by Anonymous 
chemistry
500 grams of water at 0 degrees C was heated to a boiling in a large pot. how much energy was needed? what was the temperature change and Heat energy
asked by amanda 
math
Multiply 3x + 3 by 4x2 + 4x – 2 (Points : 20)
asked by carol 
computers
can you please help me with compare and contrast Lans, Wans, Cans,Mans, Hans
asked by belinda 
p
you visit the grand canyon on a particularly hot day and like all good tourists, you yell, Hello! Would you expect to hear the echo sooner or later than on a cooler day? Why? please show all work Thank you
asked by silly 
physics
which of the following properties of a sound wave determines its pitch: wavelength, speed, amplitude, or frequency? Plese show work, Thank you, Silly
asked by silly 
physics
Will the photoelectric effect change for different targets
asked by ashley  HELP PLEASEE!!! 
Physics (please help!!!!)
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
asked by Bon Oncle 
Physics (please help!!!!)
Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
asked by Bon Oncle 
math
heelp me with scientific nottion
asked by brittany 
MATH FOR PROFESSIONALS
DISCUSS OPTIONS FOR OBTAINING A HOME LOAN AND HOW MORTAGES WORK
asked by RONDA 
Math
Solve for x. 3^(2x)2*3^(x+5)+3^10= 0
asked by Paul 
Life orientation
A)In 1015 lines critically discuss 5 ways in which the enviromental problems impacts the community.Provide relevent sources to support your claims. b)Provide recommendations on how to address the topic that you identified in the previous question. c)Name
asked by Sello 
physics
Does increasing the tension of the string affect the wavelength of the fundamental standing wave on a guitar string? Plese show all work Thank you
asked by silly 
Physics
The Apollo 8 mission in 1968 included a circular orbit at an altitude of 111 km above the Moon’s surface. What was the period of this orbit? The Moon’s mass is Mm=7.35E22 kg and its radius is Rm= 1.74E6 m
asked by Cora 
physics
How will the current in a wire change as the wavelength of light changes? I have no idea how to do this.
asked by ashley  HELP PLEASEE!!!