Questions Asked on
February 28, 2008

chemistry
the question reads: a) balance the equation: H3PO4 + Ca(OH)2 > Ca3(PO4)2 + H2O b)what mass of each product results if 750 mL of 6.00 M H3PO4 reacts according to the equation? i balanced it with: 2H3PO4 + 3Ca(OH)2 > Ca3(PO4)2 + 6H2O but i'm not sure
asked by Anonymous 
Physics
Select which of the following statements are True or False. Assume Newtonian Mechanics. 1.The work required to lift a mass one meter depends on the speed at which it is raised.. 2.The acceleration of an object is same in all inertial reference frames.
asked by josh g 
right triangles can't have decimals in the angles?
why can't a right triangle have decimals in the other two angles? it has a right angle, therefor the other two must add up to equal 180, correct? well i did my calculations, and i got 53.6 degrees for angle 1 and for angle 2, 36.4 degrees. they all add up
asked by woody 
History
What were two intended outcomes of the Green Revolution and two unintended outcomes of the Green Revolution?
asked by Christian 
Chemistry
Determine the actual yield in grams of CCL4 if 175.0g of Cl2 reacts with meathane. The percentage yield of the reaction is 75.4%
asked by LaNeisha 
Science
In a wheelbarrow, you have 2 kilograms of soil for your garden. If 8 percent of it is organic matter( decayed materials from organisms), how many grams of organic matter do you have?
asked by Dee 
Chemistry
determine the approximate molarity of a solution of NaOH prepared by diluting 10ml of 6M NaOH to a volume of 400 ml. using the solution in the first part, 24.5ml of NaOH solution was required to neutralize 26.4ml of a .150M HCl solution. find the molarity
asked by Chuck 
Prealgebra
The sum of an integer and the next greater integer is at most 15. Write an inequality to find the lesser integer. Then slove for the lesser integer.
asked by Jillian 
Chemistry
Samples of neon and helim are placed into separate containers connected by a pniched rubber tube as shown. When the clamp is removed and the gases are allowed to mix, what is the final pressure of the neon? The volume of the tube is negligible. 5.00L, 654
asked by Miley 
trig
If cos A =1/3 with A in QIV find cscA/2
asked by Rick 
chemistry
Assuming that sea water is a 3.5 wt% solution of NaCl in water, calculate its osmotic pressure at 20 deg C. The density of a 3.5% naCl solution at 20 deg C is 1.023 g/mL. How do I go about solving this?
asked by Sarah 
science
below are about 21 questions from my final study guide. I was given a 563 question study guide for my final and obviously I did not understand every question. So basically I did not understand 4% of the questions which is pretty good. Just any help with
asked by JAKE 
Trig
Verify that each of the following is an identity. tan^2xsin^2x=tan^2xsin^2x I can get it down to cos^2 on the right, but cannot get it to work out on the left. secx/cosx  tanx/cotx=1 On the left I got down to 1tan^2, but that clearly doesn't equal 1....
asked by Andrea 
Chemistry Stochiometry
The conversion factor for deriving the number of moles of salicylic acid, C7H6O3, from a given number of grams of salicylic acid is...
asked by Jeffrey 
History
What u.s. president began the interstate Highway System?
asked by Chance 
chemistry
write the formula for and indicate the charge on each of the following ions: a) sodium ion b) aluminum ion c) chloride ion d) nitride ion e e)iron (II) ion f) iron (III) ion
asked by john 
science
1.when air is cold, it has less ______. 2.the expansion joints _______ when it is cold outside. 3.the expansion joints ______ when it is hot outside. 4.what might happen to a road without expansion joints? The _____ is a blank need answer please and 4 need
asked by allison 
Physics
there's three parts, i keep getting these wrong please help. A set of crash tests consists of running a test car moving at a speed of 11.8 m/s (26.4 mi/hr) into a solid wall. Strapped securely in an advanced seat belt system, a 59.0 kg (130 lbs) dummy is
asked by Courtney 
math
Neisha is making punch. to make the punch. she needs 2 pints of lemonade. she only has 1cup measure. how many cups of lemonade should Neisha use? A 2 cups B 3 cups c 4 cups D 5 cups ( please show work )
asked by marquis 
trig
Prove the identity sin squared 0 with line/2 = csc zero with line cot zero with a line /2csc zero with a line
asked by Rick 
physics
A bullet of mass m= 0.0290 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.55 kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.65 m before stopping. Calculate the
asked by rory 
math
49 divided by n = 7 ( please show work thank you)
asked by marquis 
ss
what mountain range runs along the western coast of south america?
asked by doug 
English
Sound Words. The___ of broken glass followed the ____ of the bullet as the rifle____ .The soldiers were awakened by the _____ of the bugle.
asked by Susan 
trig
Use halfangle formulas to find the exact value for the following cot 75 degrees
asked by Rick 
Manangerial Accounting
A company had a loss of $3 per unit when sales were 40,000 units. When sales were 50,0000 units, the company had a loss of $1.60 per unit. determine contribution margin determine fixed costs determine the break even point in units
asked by Thomas 
managerial economics
The HarleyDavidson motorcycle company, which had a copyright on the word "hog," applied for exclusive rights to its engine sound. Why would a company want copyrights on two such mundane things? In my opinion. The reason for the two mundane things is to
asked by jean 
Chemistry
Please Help me with my chemistry Review I have a test tommorow? Please help me with my review my test average is low and i need at least a b to pass the class for the six weeks I am freaking out!!!! I care more about showing work i don't want answers I
asked by anon 
English
Can you help me unscramble these words: largloi, osmoe, swarlu, clame, shero, estoroit,neomelach, and treeatan. There all animal names, thanks
asked by Anonymous 
science
A substance in a solid at room temperature. It is unable to conduct electricity as a solid but can conduct electricity as a liquid. This compound melts at 755 degrees celsius. Would you expect this compound to have ionic bonds, metallic bonds, or covalent
asked by JAKE 
physics
A Princeton prof. (mass = 67.0 kg), surprised by the large stopping force he calculates for jumping flat footed from a height of 0.11 m, decides to try the experiment. Calculate he deceleration (in g's) if he stops in a distance of 0.30 cm. (Do not try
asked by rory 
Chemistry
A 3.5 liter gas sample at 20 degrees celcius and a pressure of 650 mm Hg is allowed to expand to a volume of 8570mL. The final pressure of the gas is 0.60 atm. What is the final temeperature of the gas in degrees celcius. Can anyone please show me the
asked by Miley 
statistics
Can someone please explain to me the procedures for getting an answer to the questions. Step by step would be great since I'm very confused. I know it's probably simple. * Numerous studies have demonstrated that listening to music while studying can
asked by Lily 
Math
Given that f(x) = 2sinx  cosx  Write f(x) in the form Asin(x+a)  Find the maximum value of 2sinx  cosx  Find the lowest positive value of p such that f(x) = f(x + p) Thankyou. All help is appreciated. I'm really struggling on this assignment.
asked by sqleung 
physics
A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
asked by rory 
trig
Prove the identity sin(3 pi /2 + x) + sin(3pi/2 x) = 2cosx
asked by Rick 
chemistry
Is delta Tf = delta Tb? The original practice problem is Detla Tf= 8.631 for an aqueous solution, what is delta Tb. I know that Delta Tf=Kf*m
asked by Sarah 
criminal justice
create an incident report about a bank holdup, using well constructed paragraphs, logical transitions, consistency, and professional tone. Only two tellers were in the bank at the time of the robbery. answer the question who, what, when, where, why, and
asked by Tom 
math
a vase in the shape of a cube has a side measuring of 7 inches which of the numbers below is the best estimate of how much water it will hold? a 125 in3 b 200 in3 B 200 in3 c 300 in3 d 350 in3 d 350 in3
asked by marquis 
Science
Why do all salts crystals have a distinctive cubic shape? And what happens to these atoms during this chemical reaction?
asked by Emily 
biology
what are the differences between mitosis and meiosis!?
asked by sam 
math(relation & functions) need help urgently
Seeds of type A and type B are sold in a packet each must contain a)both type a and type b seeds b)at least twice the number of type b c)as there are type a seeds no more thanm 12 seeds 1)state the minimum number in each packet of type a and type b seeds.
asked by Keisha 
Algebra Quadratic Equations
I am supposed to write a quadratic equation using only the solutions and I am only given one solution:4. It can't be (x4)=0. Can I use 0 to make (x4)(x+0)=0?
asked by Micah 
math check my work
find theta in radians to the nearest tenth if: sec(theta) = 1.4231 is this correct: enter into calculator: cos^(1)= 1/1.4231 get .7916232503, rounded to the nearest tenth = .8
asked by woody 
physics
A sphere of radius a carries a volume charge density p=p (r/a)^2. Find the electric field inside and outside the sphere. I don't know what equation to use. Do I use electirc field due to point charge?
asked by Jessica 
Chemistry
When two similar liquids mix to form a solution, the entropy of solution is expectted to be: a.negative b.zero c.positive d.negative at low T and positive at high T
asked by Sarah 
Chem 2
What is the approximate value of the K for the neutralization of nitrous acid with ammonia? Ka for the acid is 0.00045 and Kb for the base is 0.000018. Do I multiply Ka*Kb?
asked by Sarah 
For A Science/Biology teacher
Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning enzymes in these organisms. Suggest ways ectothermic organisms might cope with this problem.
asked by JACK ATTACK 
Adv. Math
How do you get these problems?? 1 3/4 + 4/5 and 3 1/8  1 1/2
asked by Kenya Ruiz 
Adv. Math
I don't understand these problems =/ How many inches are in 3/8 of a foot? How long would it take a car traveling 60 mph to go 250 miles?
asked by Kenya Ruiz 
geometry
find the measure of angel R in quadrilateral RSTW if the measure of angle R= 2x, the measure of angle S= x7, the measure of angle T= x+5, and the measure of angle W= 30.
asked by Sara 
science
A _____________________ is an earthquake that occurs after a large earthquake in the same area
asked by Julia 
MATH
a vase in the shape of a cube has a side measuring of 7 inches which of the numbers below is the best estimate of how much water it will hold? a 125 in3 b 200 in3 c 300 in3 d 350 in3
asked by marquis 
Community Corrections
Explain the correctional officer suculture. How does this subculture create ethical issues of correctional officers?
asked by Kish 
managerial economics
You own a small bank in a state that is now considering allowing interstate banking. You oppose interstae banking because it will be possible for the very large money center banks in New York, Chicago, and San Francisco to open branches in your bank's
asked by jean 
physics
A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
asked by rory 
math
you are putting in a 20ftx30ft rectangular pool. your pool must be surrounded by a concrete sidewalk of uniform width and 3in thick. write an expression in terms of x to represent the volume of concrete contained in the sidewalk. explain how you got your
asked by tyler 
math
Approximately 5 out of every 10 students at Kendra's college live on campus. The college has 5,000 students. How many of them live on campus? Set up a proportion.
asked by Kelly 
math
how would you solve [(*square root*125)^4]^1/6
asked by Cynthia 
math
How would you solve 3x times x squared = 4
asked by Taylor 
Math
Describe an application for the use of ratios or proportions
asked by Allison 
trig
Graph one complete cycle of y + cos x cos pi over6 + sin x sin pi/6 by first rewriting the right side in the form cos(AB)
asked by Rick 
science
does the sun raise in the east and sets in the west. or is it the other way around?
asked by Tori 
trig
8 sin 9x cos3x Rewrite the xpression as a sum or differnce using one of the product sum formulas Simplify if possible
asked by Rick 
engineering physics 2
A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv ity of the wire is 1.7e8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^1. Calculate the resistance of the wire
asked by David 
Chemistry
how do i make 100ml of (0.01mol/L) KMnO4 out of 10.0ml(0.10mol/L)KMnO4
asked by jessie 
workshop
Could someone help me with this. Directions Create intext citations by following the directions for each of the following sources. Example Practice Directions: Create an intext citation using the information from the following book. Mention the author in
asked by ree 
calculus
what is an upper bound on the absolute value of the error? the abs value of (the sum from n=1 to infinity of ((1)^(n+1))/(n*5^n) where it is .1826666....)
asked by laura 
calculus
test the series for convergence or divergence using the alternating series test the sum from n=1 to infinity of (1)^n/(3n+1) I said it converges, is this true?
asked by laura 
writing
whatis wrong withthis sentence Yesterday Jonny pushed the milk into a ball.
asked by Hannah 
micro economics
pb = 70 0.0005qb(brand name) pp = 200.0002qp (private label). Marginal cost is a constant $10 per tire.quantities are measured in thousands per month and price refers to the wholesale price. marginal cost is a constant $10 per tire. american currently
asked by Anonymous 
CHEMISTRY
write formulas for the binary ionic compounds formed between the follwing elements a) sodium and iodine b) calcium and sulfur c) zinc and chlorine d) barium and fluorine e) lithium and oxygen
asked by john 
Maths
Solve for x (exact solutions): sin x  sin 3x + sin 5x = 0 ¦Ð ¡Ü x ¡Ü ¦Ð  Thankyou. I tried find the solutions on my graphics calculator but however, the question is to find the EXACT solution(s) for the equation so I guess it will
asked by sqleung 
Biology
What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain your observations by discussing this reaction on a molecular level.
asked by Ali 
Social Studies
What form of government does Ireland have? Is it stable? Do they have any allies? I've been surfing the web for a really long time now, searching for the answers to these questions. I'm really stuck...
asked by Maddie 
Science
I don't understand this question... Which side of the chemical equation would energy be located on in an endothermic reaction? I understand that in an endothermic reaction it absorbes energy.
asked by Emily 
English
whats the word that means your not lying but not telling the truth. like not telling the whole truth
asked by Lena 
geography
I am trying to find this: how do we find the country's rank population such as upper class, lower class, and middle class?
asked by Jud 
homework
Distinguish among bias, prejudice, discrimination and bigotry as they relate to the issues of racial and ethnic controversies in our society.What possible solutions might social scientists suggest as a remedy for the problems related to these
asked by sugrbare24 
English Grammar
1. Reading a message is convenient for him. 2. To read a message is convenient for him. 3. It is convenient for him to read a message. 4. It is convenient his reading a message.  Are all the sentences above grammatical?
asked by John 
math
i need help with this question a bag of chcolate candies has a nutrition label ststing that each seving contains 20% of the recommended daily amount of fat.A serving has 13 grams.using this informtaion what is the recommended daily value
asked by Juliana 
is there a vertical shift for sec graphs?
for instance, what is the vertical shift for: y = 1/2secx + 1 *** by the way, that is secx + 1, not sec(x + 1)
asked by woody 
Prealgebra
Two times a number less 4 is greater than the same number plus 6. For what number or numbers is this true?
asked by Jillian 
Math
Rewrite the statement, using percent notation. Of 50 houses in a development, 20 are sold.
asked by Kelly 
Math
Ratios Please help The ratio of 5 3/5 to 2 1/10 The ratio of 7 dimes to 3 quarters Marc took 3 hours(h)to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc's time to Angelina's time as a ratio of
asked by Sherri 
Math
Please help  Ratio word problem Marc took 3 hours(h)to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc's time to Angelina's time as a ratio of whole numbers.
asked by Sherri 
WESTON C.I
DO YOU HAVE FAITH IN CANADA'S JUDICIAL?
asked by MERRY 
writing
what is wrong in this sentence Jonna and Rada are walking up the hill.
asked by Hannah 
science
What is it called when an earthquake make mud?
asked by Julia 
writng
what is wrong in this sentence yesterday jonny will push Milk into a baul.
asked by Hannah 
science
what normal kitchen ingredient will extract water from a grape
asked by Michael 
law and ethics in medicine
the officer hires an employee who's deaf, but who can lipread. what will the employer have to do in terms of this employee's job duties to comply with the americans with disabilities
asked by Anonymous 
us history
when fdr served 4 terms, which president's record did he break?
asked by sophia 
science
ocompare and contrast an house with the parts of cells
asked by elizabeth 
micro economics
Marginal cost is a constant $10 per tire.quantities are measured in thousands per month ans price refers to the wholesale price. marginal cost is a constant $10 per tire. american currently sells brand name tires at a wholesale price of $28.50 and private
asked by Anonymous 
chemistry
the third quantum number, m, indicates what property of the electron?
asked by Megan 
calculus
i have a problem figureing out this question do you have any help? need to find the input and output of these numbers input 2 & output 9, input0 & output7, input9 & output2, input20 & output8 nothing seems to work. help me please
asked by dylan 
chemistry
the third quantum number, m, indicates what property of the electron? a) orbital b) spin c) charge d) energy level
asked by Megan 
chemistry
Write an equation for the formation of ions whe KOH is dissolved in H2O
asked by gogoo000 
math
which number sentence below shows the circumference of a circle is the diameter is 10 centimeters? A 3.14 X 5= 15.7 cm C 10x5=so cm B3.14 x 10= 31.4 cm D3.14x5 squared= 78.5
asked by marquis 
chemistry
how many sublevels exist in the fourth principle energy level? a) 2 b) 4 c) 16 d) an infinite number
asked by Megan 
history art
what is the rejection of medieval style and influences of byzantine
asked by mike 
SOCIEL STUDIES
THE DENMARK STRAIT SEPARATES WHAT TWO LARGE ISLANDS
asked by PINK 
spanish
how do you say "the trip was a very great experience."
asked by ami 
math
FIND THE X INTERCEPTS OF THE GRAPH OF THE EQUATION pleaze explain thanks 1)Y=x to the second power+ 2x 8 2) Y=6X TO THE SECOND PoWER x12
asked by SYNESTER 
writing/history
what's the difference in writing style between a history paper and an english paper? i use the same style for both classes and in english i get great grades and history not so much.
asked by Tash 
Science
Which side of the equation are the reactants and products on? Which side is energy in an exothermic reaction?
asked by Emily 
MATH
6(X+52)X+4)+3(X5)
asked by Anonymous 
geography
how do i find countries with rank classes?
asked by Joshua 
Chem Urgent!
How can I divide this answer Pb2(SO4)2 it needs to be simplified by 2)?
asked by Lisa 
College Calculus
Could someone explain how to distinguish improper integrals in nonmathematical terms so I may understand? Thanks!
asked by Matt 
social studies
What architectural wonder was completed in 1648?
asked by David 
Science
I have questions on the periodic table (I don't know anything about it) Where are the elements that don't react and that are highly reactive located. Where are the shiny and ductile elements located and where are the metals, non metals and metalloids
asked by Emily 
Math
What is the answer to 12 squared = x(x+6) ?
asked by Taylor 
physics again...
A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
asked by rory 
English expression
Email messages usually come in two parts: the heading and the body.  Why do you use 'in' in this sentence as in 'come in'? Does it have a special meaning?
asked by John 
Maths
Solve the problem. Assume that simple interest is being calculated. Round your answer to the nearest cent. Susie borrowed $7500. from a bank for 18 months with interest of 5% per year. Find the total amount she repaid on the due date of the loan. (Use:
asked by Matt 
Math (Vectors)
Show that x dot y = 1/2 ( x + y^2  x^2  y^2 )
asked by Michelle 
calculus  vectors
Show that x dot y = 1/2 ( x + y^2  x^2  y^2 )
asked by Michelle 
english
what would you do if the water ran out for 48h?
asked by German girl 
human services
Could someone explain to me the difference between a response that compares and contrasts intrinsic and extrinsic motivation. and also give an example of each.
asked by judy 
communication
How can we be sure the officers interpretation of slang is accurate?
asked by ree 
Prealgebra
Onehalf of the sum of a number and 4 is less than 14. What is the number?
asked by Jillian 
Math
Find the rate 392ft/ 8 sec
asked by Kelly 
physics
The electric field in a region is given by E=ayi + axj, where a= 2V/m^2 is a constant. What is the electric potential difference between the origin and the point x= 1m, y= 2m? Do I use the formula E=  deltaV=  (V/x)i+(V/y)j+(V/z)k)?
asked by Jessica 
trig
Graph the following from X = 0 to x = 2 pi 2cos 6x cos4x + 2 sin 6x sin 4x
asked by Rick 
Electrostatics
A linear charge rho L = 2.0 uC lies on the yz plane. Find the electric flux passing through the plane extending from 0 to 1.0m in the x direction and from infinity to infinity in the y direction. Alright, so the formula to use is: flux =
asked by Dan 
trig
If tan(A+B) = 2 and tan B =1/3, find tan A
asked by Rick 
trig
Graph the followiing function from x + 0 to x = 4 pi y = 3 cos squared x/2
asked by Rick 
Jason
I understand that polymers are long chain 50020,000 repeating units, but I don't know: what car components are made of polymers?
asked by chemistry 
Math
Help me Proportions A store has Tshirts on slae at 2 for $5.50. At this rate, what do five Tshirts cost?
asked by Sherri 
french
what is the difference between le jardin and la terrasse?
asked by anonymous 
chemistry
Consider an acid, HA, with pKa =3.33 0.025 moles of hydroxide ion are added to 17.4mL of a 0.519 M solution of the acid. What is the resulting pH? I know pKa=log([Ka]) pH=log([H+]) I don't know how to link this information. Thanks
asked by Sarah 
atomic energy
How can I share my school notes on the internet? Do you know of any web sites where a student can post his school notes? Love, Candy
asked by Candy 
Math
What is the lateral area, total area, and volume of a rectangular solid whose l=7, w=6, & h=2?
asked by Sumaita 
calculus
test the series for convergence or divergence. the sum from n=1 to infinity of ((1)^n*e^n)/(n^3) I said it converges because the derivative of (1/n^3) is decreasing
asked by laura 
United States
I need to know what the difference is between a commonwealth (Puerto Rico) and a territory (Guam) of the United States. If anyone could help, that would be great!
asked by Jenna 
math
Does anyone know how to clear the table on a TI84 graphic calculator?
asked by Alejandra 
French
How would you say Radisson Home and Grill? This is due tommorrow and i need help
asked by Bill 
math
Does anyone know what 11 means?
asked by Olivia 
Jack
how does cross linking alter the properties of a polymer?
asked by chemistry 
science
why will deer travel for many miles to get a salt lick?
asked by ray 
math
Does anyone know how to calculate exponential regression on a graphic calulator? I already entered values into my statistics utility but I'm still confued. My problem asks that if a substance has a life for 24 years, and a sample of 80 grams is being
asked by Maria 
Science
the clue is region of precambrian rock and the scrambled is slideh
asked by cheyenne