Questions Asked on
May 5, 2010

Chemistry
Can somone please explain this problem to me? The hydrolysis equilibrium constant (Ka) for NH2NH3+ is 5.88E9 (eq. 1). (eq. 1): NH2NH3+(aq) + H2O(l) = H3O+(aq) + NH2NH2(aq) Calculate the value of the base dissociation constant (Kb) for NH2NH2 as shown in
asked by John 
basic psy
classical conditioning examples of us  the clicking of the gun ur  running away cs  gun shoots cr  the running away from the clicking of the gun are theses correct examples
asked by anna 
chemistry
What is the molarity of H3O+ in a 5.33×10^4 M NH2NH3Cl solution that hydrolyzes according to the equation. NH2NH3^+(aq) + H2O(l) = H3O^+(aq) + NH2NH2(aq)
asked by Diem 
Chemistry
Calculate the molar concentration of H+ ion of a solution that is 3.45×101 M in CH3CO2H and 1.62×103 M in the salt CH3CO2Li. CH3CO2H(aq) = CH3CO2(aq) + H+(aq)
asked by Jeby 
Reading
Can you summarize this please? 'Contagion'
asked by Ishana Mishti Aapke Babe 
math
a boat crosses a river and arrives at a point on the opposite bank directly across from its starting position. The boat traveks at 4m/s and the current is 2m/s. If the river is 600 m wide in what direction must the boat steer and how long will it take to
asked by Ann 
Chemistry
What is the pH when 0.40 g of NaOH is added to 50.0 mL of 0.10 M HCooh? No volume change. (The Ka for HCOOH = 1.8 x 10^4.)
asked by Ron 
managerial economics
Robert E. Lee Grade School is contemplating a chocolate bar fund raiser. Weekly sales data from Mrs. Grant's fifth grade class indicate that: Q = 4,000  1,000P where Q is chocolate bar sales and P is price. i) How many chocolate bars could be sold at RM2
asked by genise 
Chemistry
Does the solid Zn(OH)2 dissolve when concentrated lye, NaOH solution, is added to a beaker containing a saturated solution of Zn (OH)2 and a small amount of Zn(OH)2?
asked by Ron 
calculus
Evaluate the indefinite integral. integral of 4e^(4x)sin[e^(4x)]dx
asked by mary 
calculus
Find the volume of the solid formed by rotating the region enclosed by y=e^(1x+2), y=0 ,x=0 , x=0.7 about the xaxis.
asked by mary 
algebra
Rewrite the following as an equivalent logarithmic equation.Do not solve. y^t = x answer logy+logt=logxis this right also Express as an equivalent expression that is a sum of logt (3ab) the t is at the bottom of the g answer log3+loga+logb logarithms.
asked by dani 
calculus
Find the volume of the solid formed by rotating the region enclosed by y=e^(1x+2), y=0 ,x=0 , x=0.7 about the xaxis.
asked by mary 
chemistry
for haloacetic acids, HBr has higher stronger acid strength then HF but doesnt HBr has low dipole then
asked by bme1 
Statistics
Hi folks, I'm having trouble with figuring out the intensity matrix for a particular birth/death process. Customers arrive in pairs in a Poisson stream with intensity lambda. There is waiting room for one customer. Service time is exponentially distributed
asked by anti_prefix 
science
1a)A block of mass=100kg is tied to a donkey that moves with constant acceleration of 20cm/s^2 up a 30 degree incline. What is the force with which the donkey pulls on the block parallel to the incline? the coefficient of kinetic friction between the
asked by Anonymous 
Chem
Suppose solute A has a distribution coefficient of 1.0 between water and diethyl ether. Demonstrate that of 100mL of a solution of 5.0g of A in water were extracted with two 25mL portions of ether, a smaller amount of A would remain in the water than if
asked by Anonymous 
11th Grade Chemistry Redox
I’m studying Redox Chapter. In this chapter I came across a point regarding oxidation. “Loss of electron results in decrease in negative charge” e.g MnO^2 = MnO^ + e^ 2Cl^ = Cl2 + 2e^ S^2 = S + 2e^ Now first tell me what does "2e^" means
asked by Akashdeep Singh Pune 
chemistry
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0 container. At 23.0 , the total pressure in the container is 3.50 . Calculate the partial pressure of each gas in the container.
asked by emmanuel 
calc
A car is heading northwest at 80 km/h and a truck is heading east at 60 km/h. Determine the velocity of the truck relative to the car.
asked by Anonymous 
calculus
A pilot wishes to reach an airport 350 Km due east from his present position. The wind is blowing from N25degreesE with a speed of 80Km/h and the planes airspeed is 400 km/h. What ground speed and what heading should the pilot steer to reach the airport?
asked by Anonymous 
science
What word can these unscrambled letters be (htawree). The hint is sun
asked by cleo 
Economics
2.The ownermanager of Good Guys Enterprises obtains utility from income(profit) and from having the firm behave in a socially conscious manner, such as making charitable contributions or civic expenditures. Can you set up the problem and derive the
asked by Jorie 
11th grade Physics
If you hold a bar magnet in each hand and bring your hands together, will the force be attractive or repulsive if the magnets arte held so that A) the tow north poles are brought close together? B) a north pole and a south pole are brought together?
asked by David Nipp 
11th grade Physics
A student makes a magnet by winding wire around a nail and connecting the wire to a battery. Which end of the nail will be the north pole?
asked by David Nipp 
11th grade Physics
A long,straight currentcarrying wire runs from north to south. A) A compass needle placed above the wire points with its Npole toward the east. In what direction is the current flowing? B) If a compass is put underneath the wire, which direction will the
asked by David Nipp 
English
Can you help me paraphrase the meaning of the following lines? 1)The plants are described as "veins bathed in liquor of such power as brings about the engendering of the flowers". The plants are described as veins soaked in a liquor of such power that it
asked by Franco 
Gen 105
Having trouble finding a site to intrapersonal and musical intell. is there asite
asked by Renee 
General Math
IF ONE CLERK CAN PROCESS 75 PIECES OF MAIL IN 2 AND A HALF HOURS, HOW LONG WILL ITTAKE EIGHT CLERKS TO PROCESS 1620 PIECESOF MAIL IF ALL OF THEM WORK AT THIS SAME RATE?
asked by SAPPHIRE 
Biology
A friend tells you that because he has just recovered from a cold, he now cannot get the flu. Is your friend right? Explain your answer.
asked by CC 
literature
for my literature class, I need to imitate Ray Bradbury and choose a plot/conflict that he would choose and write about it. I know that he likes writing scifi and stories set in future. do you have any ideas of what I could write about? it needs to be
asked by ayla 
Math
Find an equation of the parabola. vertex:(1,2) focus:(1,0) (x+1)^2 = 4p(y2) (x+1)^2 = 0(y2) (x+1)^2 = (y2) Am I correct?
asked by Abbey(Please help) 
social studies
Which ancient civilization was the first to invent the plouhs?
asked by Pratiksha 
Math
Find the vertex, focus, and directrix of the parabola. x^2  2x + 8y + 9 = 0 x^2  2x +1 = 8y + 9+ 1 (x1)^2 = 8(y1.25) vertex:(1,1.25) focus:(1,.75) directrix: y=3.25
asked by Abbey(Please help) 
English
Which of the following is CORRECT? A. She sings bad. B. He runs a well race. C. They won with a lucky shot. D. All of the above.
asked by Judy 
social studies
which ancient civilization was the first to invent ploughs, sundial, watercloock, paper, printing, umbrella, kites, wheel and gun pouder?
asked by Pratiksha 
laws
I am having trouble with this question some someone help to explain this better to me? What is the difference between licensure and accreditation? Why would a longterm care provider seek accreditation?
asked by april 
english
Which of the following is correctly stated in the past tense? A. I see it. B. I saw it. C. I seen it. D. I did saw it.
asked by Judy 
english
Which of the following shows the comma(s) in the right position(s)? A. Juan, and Mason play well together. B. Jimmy closed his eyes, and counted to twenty. C. Jose, Juan, Mason, and Jimmy all went swimming. D. The reason, that he is late, is that he got
asked by Judy 
english
Which of the following is NOT a complete sentence? A. Throwing the ball to the pitcher. B. That baby cries and cries. C He sometimes steals things. D. I don't know the answer to this one.
asked by Judy 
english
Which of the following parts of speech is most often used with a noun to create a descriptive phrase? A. pronoun B. preposition C. adverb D. conjunction
asked by Judy 
bucks
example of an derivative or innovative movie character
asked by christina 
algebra
which inequality is the same as 4x + 2y = 2x + 4 b)y
asked by paul 
trigonometric
2 cos x  1 =0
asked by charles 
chemistry
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics,
asked by nick 
polymer chemistry
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics,
asked by nick 
Math
The rectangular coordinates of a point are given. Find two sets of polar coordinates for the point for 0 is less than or equal to Q is less than 2pi. (3,3) My answers were (3sqrt2, pi/4) and (pi/4, 3sqrt2). My teacher said that my answers have to be in
asked by Abbey(Please help) 
New Buffalo High
how many milliliters of a stock solution of 2.00 M KNO3 would you need to prepare 100.0 mL of 0.150 M KNO3?
asked by Nikki 
algebra
Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the
asked by paul 
algebra
Can you please tell me me if the expression or equation that is equivant to 8^x=3 would be x log 3 = log 8?
asked by dani 
Math
Find the vertex, focus, and directrix of the parabola. x^2  2x + 8y + 9 = 0 x^2  2x +1 = 8y + 9+ 1 (x1)^2 = 8(y1.25) vertex:(1,1.25) focus:(1,.75) directrix: y=3.25 My teacher said that I have sign errors. I do not know where I went wrong.
asked by Abbey(Please help) 
writing
I am writing a character analysis on "everyday use" by alice walker. I am having trouble with my thesis. This is what I have "Even though Mama loves both of her daughters, she is jealous of Dee’s true characteristics of being strongminded, educated, and
asked by tina 
Math
Test for symmetry with repsect to Q=pi/2, the polar axis, and the pole. r=16cos 3Q r=16cos(3pi/3 + 3h) = 16(cos3pi/2 3h sin 3pi/2 sin h) cos 3pi/2 = 0 sin 3pi/2 = 1 Not symmetrical My teacher said that this was wrong!Why?
asked by Abbey 
Chemistry
What is the pH when 0.40 g of NaOH is added to 50,0 mL of 0.10 M HCOOH? No volume change. (Ka for HCOOH  1.8 x 10^4.)
asked by Bill 
chemistry
A 3.455 g sample of vinegar is titrated. It requires 16.83 mL of 0.2145 M NaOH to get to the phenolphthalein end point. Calculate the weight percent of acetic acid in this sample of vinegar. ____ % Note: calculate the molecular weight to one decimal place,
asked by ashlee 
chemistry
How many mL of 0.750 M HCl are needed to neutralize 14.89 mL of 0.350 M NaOH? ____ mL
asked by ashlee 
College Chemistry
Is 50.0mL of 1.0 MHF and 50.0 mL of 1.0M NaOH a buffer solution with a pH of 3?
asked by Bill 
Security
What role should nonsecurity personnel play in an emergency plan and disaster response? Should these roles be included in a procedures manual? Why or why not? How can a company or organization balance safety and liability issues with the use of
asked by juliet 
physics
I have a Pressure in atm and a volume in liters how do i find the temperature in kelvins?? I know the formula pv=nRT works...but i don't know the number of moles so... I don't know what to do.
asked by Katy 
Physical Science
What is the difference between a compound and a molecule?
asked by Sue Ann 
Math
Test for symmetry with repsect to Q=pi/2, the polar axis, and the pole. r=16cos 3Q r=16cos(3pi/3 + 3h) = 16(cos3pi/2 3h sin 3pi/2 sin h) cos 3pi/2 = 0 sin 3pi/2 = 1 Not symmetrical My teacher said that this was wrong!Why?
asked by Abbey(Please help) 
chemistry
if the mass of protons are halved and that of neutrons doubled to that of the actual values, what percentage change would have been found in the atomic mass of chromium whose actual atomic mass is 52.
asked by jaya 
trig
(22i)^5 find the given power write answer in rectangular form
asked by stacey graham 
english
what verb tense is this sentence? By this time next sorung, ellis will write a book based on his research on the multitalented mockingbird.
asked by brandon 
Physical Science
with a pure substance how can you tell whether it is a compound or an element?
asked by Jackson 
math
When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= 16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in
asked by casey 
math
When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= 16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the initial velocity (speed) in ft/sec and “k” is the initial height in
asked by casey 
Math
Find an equation of the hyperbola with its center at the origin. vertices:(3,0)(3,0) Foci (5,0)(5,0) My answer was x^2/3  y^2/22 = 1. I do not know how to find a.
asked by Abbey(Please help) 
art
Which below is NOT associated with Impressionists: a. influence of photography b. an interest in the effects of light and atmosphere c. a sketchines, broken brush strokes d. painting outdoors e. exotic subjects from Africa
asked by Sabrina 
physics
can electric current be generated by magnetic force?
asked by Larry 
Physical Science
Can anyone explain why covalent bonds are formed when nonmetals from the right side of the periodic table bond with each other with some examples?
asked by Jackson 
science
A neckless weighing 50 g in air, but it wheighs 46 g in water . Assume copper is mixed with gold to prepare the neckless. Find out how much of copper is present in it?(specific gravity of gold is 20 and that of copper is 10)
asked by arun 
Math
Find an equation for the hyperbola. vertices:(2,3)(2,3) Foci:(2,5)(2,5) I used the midpoint formula to find the center and I came up with (2,0). I just don't know how to find a and b.
asked by Abbey(Urgent Please help) 
geometry
copying figures a  b a _______________________b i did a + b i was wondering if you do a  b the same way
asked by yelena 
Math
The rectangular coordinates of a point are given. Find two sets of polar coordinates for the point for 0 is less than or equal to Q is less than 2pi. (3,3) My answers were (3sqrt2, pi/4) and (pi/4, 3sqrt2). My teacher said that my answers have to be in
asked by Abbey(Urgent Please help) 
calculus 1
can you please help me, i'm really confused Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the xaxis. y= 20sqrt y, x=0, y=1
asked by Miya 
Chemistry
Will or will no accor this reaction? Na + Al2(SO4)3
asked by Robert Patric 
8th grade
what is a historical fact about independent and dependent events. im having so much trouble finding this answer on the enternet. HELP! thanks
asked by Dylan 
Accounting
Which of these assets are "quick assets"? Cash and cash equivalents Shortterm investment Trading assets Accounts receivable Inventories Deferred tax assets Other current assets I am thinking "cash and cash equivalents" and "accounts receivable"
asked by Mike 
math
How do get a percent from a equation that is cubed
asked by Dude really 
Math
what page in the 8th grade texas math book is the let,if,then problems.
asked by Dude really 
Math 115
Determine the Maximum and minimum values: 3, 2, 7/12, 3/4, 5/6, 10/3, 5/2
asked by Sonia 
6th grade
please explain me about acid and alkalis
asked by zainab 
Chemistry
SO3, CaCO3, Ag2S, and Zn(OH)2. Is this right?
asked by Mary 
Chemistry
I think that titrating NH3 with HCl solution has a neutral equivalence point where the pH = 7.0. Is this right?
asked by Mary 
algebra
how would i solve this rational equation y+2/y=1/y5
asked by Danielle 
PreCal
Test for symmetry with respect to Q=pi/2, the polar axis, and the pole. r=6 sinQ I know I have to replace (r,Q) with (r,piQ) (r,Q) and (r,Q) so would that be (6,pi/2)? I do not know how to find the Q.
asked by Abbey 
Algebra
Hi, I need to expand the bracket in this equation but am unsure of how too, any help would be appreciated. (4y3)^2
asked by Sam 
MEDICAL BILLING
HOW TO FILL A INSURANCE CLAIM FORM FOR THIS : New F pt comes in complaining of it frat toe pain. Incised, drained, and cleaned ares around nail on it great toe. DX onychia and paronychia. strarted on antibiotic and adv to retn in 2 days for permanent
asked by MIRIAM 
history
What factors that led to political stalemate and the subsequent farmers’ revolt in the late 19th century?
asked by jen 
Algebra
Please help! I need to factorise and solve this equation, x^2 +x 30 =0 I then need to explain how I would use the answer drom this to solve the equation 4x^2 +4x120=0
asked by Mac 
Algebra
Could someone check this for me please? The equation is 2/x+3 = 4/x+7, and I think the answer is x=1, I just need help showing the steps of how to get there if anyone knows? Many thanks for any help
asked by Dereck 
Math
Choose two of the following types of displays: dot plots, stem and leaf plots, histographs, pictographs, line plots, or circle graphs. In which situations is it appropriate to display data using each type you selected?
asked by Anonymous 
Keyboarding and Word processing
The _______ enables you to see the hard returns on your screen.
asked by Deanna 
Keyboarding and Word Processing
The _________ enables you to see the hard returns on your screen. Choices are: STATUS BAR, SCROLL BAR, SHOW/HIDE BUTTON, or PRINT PREVIEW BUTTON.
asked by Deanna 
Physics
A 0.50m long wire is carrying a current of 8.0A toward the east. The wire passes through a magnetic field of 0.40T toward the north. What is the force which acts on the wire? What is the direction of the force.
asked by Javier 
Physics
A wire 75cm long carrying a current of 6.0A toward the north passes through a uniform magnetic field. The magnitude of the force acting on the wire is 0.60N and is directed downward. What is the strengh and direction of the magnetic field?
asked by Javier 
psychology
Discuss the turmoil theory of adolescence
asked by Lallie 
Physics
A copper wire 0.40m long carries a current of 6.0A and weighs 0.35N. What strenght magnetic field is required to balance the weight of the wire?
asked by Javier 
Math
2 square root 3(square root of 7 square root of 3)
asked by Scott 
Chemistry
What does the subscript "s" on H2O(s) signify? A. seconds B. Super hard C. It is in its standard state. D. It's a solid
asked by Tierra 
Math
(1+ square root of 5)(square root of 3square root of 5)
asked by Scott 
math
83g=2+2g
asked by mckenzie 
physics
when a automobile moves overe a wide, closed loop of embedded in a road surface, the magnetic field of the earth within the loop altered? is a pulse of current produced? can you cite a pratical application for this at a traffic intersection?
asked by shead 
French
Could you please tell my why it is: "Une vraie joie de vivre habite cette famille" and not: "Une vraie joie de vivre vit cette famille" Merci beaucoup!
asked by E.G. 
poetry
what are some possible nature poems with a rhyme scheme of AAAA or AABB or ABAB or ABCB WITH alliteration,metaphor,onomatopoeia,personification,and simile
asked by kassandra 
Math
Hi, can anyone help to: determine the equation of a parabola with the vetex (0,3) and passing through (3,4)? How to figure out the coeffiecient of X?
asked by Me 
Math
Hi, can anyone help to: determine the equation of a parabola with the vetex (0,3) and passing through (3,4)? How to figure out the coeffiecient of X?
asked by Me 
English
Thank you a lot for your corrections. Let me know if everything is OK now. 1) First, Chaucer describes the genle spring rain, which ends the drought of March. 2) Then he mentions the plants whose life source has such a powerful liquid that it sprouts the
asked by Franco 
math
use a vertical motion model to find how long it will take a walnut to reach the ground if it falls from the top of a 55foot tree?
asked by elisabeth 
kija
Find the volume of a rectangular prism with l= 15 in., w=13 in., and h= 8 in.
asked by Anonymous 
math
If the area of a figure is 49 how do I round it to the nearest tenth?
asked by Anonymous 
math
joe plays ball for 1 hr. and 15 min. his mother calls him in for dinner at 5:05 pm. did joe start playing at 2:55 pm? explain how you know your answer is correct.Use numbers to explain your answer
asked by st 
Chemistry
explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
asked by Jenifer 
Physics 1
Forces of 20 N at 80 degrees, and 50 N at an angle of 210 degrees, measured counterclockwise from the positive xaxis, act on an object. What are the components (Fx, Fy) of the resultant force (in Newtons)?
asked by Fallon 
Physics 1
A 0.620 kg basketball is dropped out of a window that is 6.40 m above the ground. The ball is caught by a person whose hands are 1.61 m above the ground. How much work is done on the ball by its weight?
asked by Fallon 
Physics 1
A 64.9 kg skier coasts up a snowcovered hill that makes an angle of 25.4° with the horizontal. The initial speed of the skier is 8.67 m/s. After coasting a distance of 1.92 m up the slope, the speed of the skier is 4.33 m/s. Calculate the work done by
asked by Fallon 
Marketing
Growth of B2C ecommerce in next few years: Good or not so good for consumers? Draft a response to the Marketing Concepts: Discussing Choices and Ethical Issues, question #6 found on p 532 of the text. Read below. Chapter Review Marketing Concepts:
asked by Anonymous 
chemistry
How many grams of hydrogen can be produced by the electrolysis of water with a current of 0.442 A running for 2.00 min? I got 0.000549g. can someone check my answer
asked by long 
chemistry
What is the IUPAC name of the following compounds? CH3 I CH3CHCH2CH2CHCH2CH3 I CH2CH3
asked by long 
science
What is name of entire physical universe?
asked by bryce 
Science
I need an idea of a simple machine to build that is useful... I can't find any though.
asked by Livi 
PreCalculus/Trigonometry
Sketch an angle in standard position 7Pie Divided by 12
asked by Payalicou 
Biology Research Paper
I need help writing a conclusion for my research paper..please help! I need to finish this ASAP. Thanks We find it mixed in our food on the shelves in the supermarket and growing in a plot down the lane. It is variously known as genetic engineering, which
asked by mysterychicken 
Digital Imaging
In regards to Photoshop 4, if you could recommend one feature for me as a beginner to concentrate on, that was pretty basic, but enhanced photos tremendously, what would it be?
asked by Jim 
Chemistry
Determine the boiling point elevation of H2O in each of the following solutions: 1)2.5 m solution of C6H12O6 (glucose)in H2O. 2) 3.20 g C6 H12 O6 in 1.00 kg H20 3) 20.0 C12 H22 O11 (sucrose) in 500.g H2O
asked by Tina 
math
7x^2+58x45?
asked by Anonymous 
algebra
Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the
asked by paul 
american literature
what repetition did Patrick henry use in his speech
asked by Anonymous 
Chemistry
How many milliliters of a 0.20 M KOH are needed to completely neutralize 90.0 milliliters of 0.10 M HCl?
asked by Danny 
Speech
Hi. I have to write a speech for student council vice president...this is what i have. tell me what you think! Hi! I’m Ella and I would like to be your student council vice president. You should vote for me because I am responsible, creative, good with
asked by Ella 
Chemistry
I think that these precipitates have their molar solubility affected by pH changes: BaSO3, CaCO3, Ag2S, Zn(OH)2. Is this right?
asked by Mary 
Accounting
Which of these assets are "quick assets"? Cash and cash equivalents Shortterm investment Trading assets Accounts receivable Inventories Deferred tax assets Other current assets I am thinking "cash and cash equivalents" and "accounts receivable"
asked by Mike 
statistics
An auto maker estimates that the mean gas mileage of its sport utility vehicle is 20 miles per gallon. A random sample of 8 such vehicles had a mean of 18 per gallon and a standard deviation of 5 miles per gallon. At á=0.05, can you reject the auto
asked by George 
chemistry2
if 160g of Al reacts with O2 to produce 260g of Al2O3.calculate the theoretical yield and the percent yield 4Al+3O2 2Al2 O3
asked by chris 
Statistics
A maker of microwave ovens advertises that no more than 10% of its microwaves need repair during the first 5 years of use. In a random sample of 57 microwaves that are 5 years old, 13% needed repairs. At á=0.01, can you reject the maker’s claim that no
asked by George 
7th grade science
what is the loss of soil from wind erosion?
asked by mary 
Art
Which below became the most highly regarded art in Islamic lands? a. sculpture b. architecture c. calligraphy d. painting e. meatls I think it is B.
asked by Sabrina 
7th grade science
what is the process that results from wind erosion?
asked by mary 
Art
Nonrepresentational art does not represent or refer to the visible world. True or False. I put True I'm I right?
asked by Sabrina 
Statistics
A medical research team studied the number of head and neck injuries sustained by hockey players. Of the 200 players who wore a fullfaced shield, 40 sustained an injury. Of the 250 players who wore a halffaced shield, 60 sustained an injury. At á =
asked by George 
algebra
Quan is shopping. He can buy 2 pairs of pants and 1 shirts for $79.85 ( before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85 (before tax is added). To figure out how much a shirt or a pair of pants costs,you must first identify the
asked by paul 
Science
what mammal order has the following dental formula: 006/406?
asked by Lacey 
Statistics
In a survey of 1037 adults, ages 65 and over, 643 were concerned about getting the flu. a) Find the point estimate for the population proportion , p , of those concerned about getting the flu. b) Construct a 90% Confidence Interval for the population
asked by George 
Chemistry
As a sample of the radioactive isotope 131 I decays, its halflife a)decreases b)increases c)remains the same
asked by Danny 
algebra
Thank you Poppy and Reiny!!!!!!!!!!!! :)
asked by paul 
marketing managment
Supposed you have been hired as a Marketing manager in a Food Supplement Company. Your company is planning to introduce Packed Branded Fresh Vegetables in the market. Selected target market for your company is Lahore. Now you are required to prepare an
asked by Anonymous 
drama
need help finding australian stistics about pollution.
asked by jessica 
Grade 12 Grammar
This sentence needs to be rewritten in order to avoid gender bias or sexist words. "Mr. Delvecchio, I'd like you to meet Mr. Hamid, Mr. Dawson, and Sophie, our secretary."
asked by AL 92 
Chemistry
At a particular temperature, K = 3.75 for the following reaction. SO2(g) + NO2(g) SO3(g) + NO(g) If all four gases had initial concentrations of 0.520 M, calculate the equilibrium concentrations of the gases
asked by Erin 
science
If you blow into a test tube of bromothymol, what happens?
asked by kearia 
chemistry
explain how you would make the following solution. You should tell how many grams of the substance you need to make the solution, not how many moles. 2L of 6M HCl
asked by Jenny 
English Literature
The Celebrated Jumping Frog of Calaveras County 2. Wheeler suggest that the most surprising thing about Jim Smiley's betting was a. his success. b. his lack of success. c. his cheerful attitude about it. d. the range of things on which he would bet. I
asked by Jennifer 
science
What is a characteristic an organism has because of interaction with the environment
asked by Carmynne 
algebra 2
solve the triangle triangle BCD
asked by Tristan 
Math
Evaluate can you please show me the steps. 3/43/16
asked by Candice 
algebra 2
Solve the triangle triangle EFG
asked by Tristan 
math
Solve the equation: 2x/5x/3=3 How do u do this? Thank You!!!
asked by Meghan 
chemistry
how to find grams from 12 moles
asked by Anonymous 
Chemistry
which has biggest change in freezing point among sodium chloride,calcium chloride,and sucrose
asked by Anonymous 
Chemistry
Calculate the pH of a buffered solution that is 0.100M in C6H5COOH (benzoic acid, Ka = 6.4 x 105) and 0.100M in sodium benzoate (NaC6H5COO).
asked by Rachel 
pronouns
Are there any errors of pronoun use in these sentences? 1. Let's keep this a secret between you and me. 2. Each one of us have problems. 3. After we have seen it, we'll pass it along.
asked by AL 92 
English
Posted by rfvv on Sunday, May 2, 2010 at 10:33pm. 1. Are you finished cleaning? 2. Are you finished with cleaning? (Which one is correct?) English  SraJMcGin, Sunday, May 2, 2010 at 11:09pm 1. Are you finished cleaning.= correct 2. I'd use the noun
asked by rfvv 
chemistry
What can be said about opposing forces of attraction when sodium chloride dissolves in water?
asked by Anonymous 
Chemistry
Magnesium reacts with oxygen to form magnesium oxide according to the following equation: 2Mg(s) + O2(g) ==> 2MGO(s) If 0.81 grams of magnesium oxide are formed, how many grams of oxygen reacted?
asked by Danny 
Chemistry
Compare two reactions, one requiring the simultaneous collision of three molecules and the other requiring a collision between two molecules. From the standpoint of statistics, which reaction should be faster? Can someone please help&explain this please?
asked by Jon 
Biology
Explain why a heavy rainfall on a fruit orchard in the spring might result in a poor fruit yeild in the fall.
asked by Christina 
Math
(1+ square root of 5)(square root of 3square root of 5)
asked by Scott 
Biology
For what biological reason do farmers object to picking apple blossoms during the apple blossom season?
asked by Christina 
Physics
Two violin players tuning their instruments together hear 8 beats in 2 s. What is the frequency difference between the two violins
asked by Anonymous 
sentences please help
whats a sentence for rivals, otanist, nurient.
asked by mat 
chemistry
describe the opposing forces of attraction that are at work in the dissolution of calcium chloride. which are greater?
asked by Anonymous 
Philosophy
I need help understanding the following passage: “Could we suppose two distinct incommunicable consciousnesses acting in the same body, the one constantly by day, the other by night; and, on the other side, the same consciousness, acting by intervals, in
asked by S 
7th grade science
what is the process that results from wind erosion?
asked by mary 
7th grade science
what is the process that results from wind erosion?
asked by mary 
math
Graph the linear equation. 3x + y = 6
asked by zach 
chemistry
dimethylglyoxime is used as a reagent in qualitative analysis to precipitate the nickel(II) ion. a solution is made by dissolving 57.0 grams of DMG in 430.0 g of ethanol. (a) what is the mole fraction of DMG in this solution? (b) what is the molality of
asked by Anonymous 
grade 12 chemistry
what amount of magnesium chloride will be produced when 250 ml of 8.0 mol/Hcl reacts with excess magnesium
asked by Amy 
trig
sin(theta)cos(theta)sec(theta)csc(theta) How do I simplify
asked by stacey graham 
Chemistry
What is the molar solubility of CaF2 if o,1o mol of NaF are added to 1.0L of a saturated solution of CaF2? The Ksp for CaF2 is 4.0 x 10^11. I get 4,0 x 10^9. Is this right?
asked by Mary 
trig
sec^2x/tanx (tanx) how to simplify
asked by stacey graham 
math
_______ = 32/(16/2) _______ = (32/16)/2
asked by Anonymous 
Chemistry
A solution may conain the ions Ba^2+, Ag^+, and Cu2+. Add sodium chloride and get a white predipitate. The supernatant is decanted, potassium sulfate solution is added to the supernatant and no reaction is observed. Add sodium hydroxide and get a blue
asked by Mary 
Math
A computer transmits 11 Web pages in 4 seconds to a Web server. A second computer transmits 33 pages in 8 seconds to the server. Are these two computers transmitting at the same speed?
asked by Sarai 
philosopher 105
do you have any work on week 7 checkpoint phi 105?
asked by lisa smith 
Chemistry
Does titrating HNO3 with NaOH have a neutral equivalence point where the pH = 7.0? I say yes. Is that right?
asked by Mary 
physics
A 2.000kg particle rests on a frictionless horizontal surface and is attached to the free end of a spring. The particle is pulled horizontally so that it stretches the spring 0.05 m and is then released from rest at t = 0. Determine the displacement, x,
asked by lucas 
health
what is spiritual health?
asked by ronnel 
Philosophy
I need help understanding the following passage: “Could we suppose two distinct incommunicable consciousnesses acting in the same body, the one constantly by day, the other by night; and, on the other side, the same consciousness, acting by intervals, in
asked by S 
AP history
Decade charts  teacher looking for Prospects  what would that mean
asked by mitch 
Chemistry
What is the (H30) concentration when 40 mL of 0.10 M nitrous acis, HNO2, are added to 10.0 mL of 0.10 M HCl? Ka for HNO2 is 4.0 x 10^4. I get 1 x 10^3. Is this right?
asked by Mary 
chemistry
under what condition will the condensation of a liquid be an irreversible process?
asked by Felicia 
Preap 7th grade math
Beads for sale: 12cents for 15. Write an equation relating the cost (c) and the number of beads (n) for the beads.
asked by Ken 
Math
"Three of the coordinates of the parallelogram STUV are S(2,2), T(7,7) and U(5,15). State the vector ST and hence determine the coordinates of V." So I've figured out that ST = (9,9), but I don't see how that helps me find V.
asked by Stuck 
algebra
Graph the linear equation. 3x + y = 6
asked by zach 
EnglishStatistics
I'm doing a small research project and it's on Canadian statistics of date rape. What I need for this project: 1.Definition 2.Seven main points 3.I have to tie it in to Melinda's Situation. Melinda is a character in the book speak. She has gotten raped in
asked by Sara 
Vectors
A triangle has vertices A(2,3,7), B(0,3,4) and C(5,2,4) a.) Determine the largest angle in the triangle.
asked by Sarah 
Vectors
A mass 0f 10kg is suspended by 2 pieces of string, 30 cm and 40 cm long, from twp points that are 50cm apart and at the same level. Find the tension in each piece of string.
asked by Darren 
precal
solve this system of equation 3xy+5z2w=44 x+6y+4zw=1 5xy+z+3w=15 4yz8w=58
asked by jenny 
Math  another question
"In the expansion of (2ax)^5 the coefficient of x^2 is 5. Find the value of a". I know I have to use the binomial theorem to help me, but I don't know how.
asked by Stuck 
science
what part of a plant does vanilla represent
asked by mary 
Reading
Can you summarize this but not reveal the ending like instead of the ending, type 'Read to find out what happened'. Backspace the spaces: h t t p : / / w w w . d o c i n . c o m / p  3 4 5 9 9 3 4 9 . h t m l
asked by Ishana Mishti Aapke Babe 
Accounting
Which of these assets are "quick assets"? Cash and cash equivalents Shortterm investment Trading assets Accounts receivable Inventories Deferred tax assets Other current assets I am thinking "cash and cash equivalents" and "accounts receivable"
asked by Mike 
WRITING(POEMS)
IS BUTTERYNESS SPELLED LIKE THIS BECAUSE SPELL CHECK IS NOT PICKING IT UP .
asked by lauren 
Math
I have a bag of tiles 09. Without looking select a tile, record, return tile, select a second tile. What is the probability that exactly one tile will be a prime number?
asked by Sally 
PreCal
Given that lim x> f(x)=6 and that lim x> g(x)= 4, evaluate the following limit. Assume that c is a constant. lim 2f(x)  12 / g(x). x>. I did 2(6)  (12/4) 12  (3) 12 + 3 9
asked by Randy 
basic psy
example of classical conditioning acquisition, extinction, spontaneous recovery
asked by anna 
Math
katie is going to adopt kittens from a litter of 11. how many ways can she choose a group of 3 kittens?
asked by Leila 
Math
State whether each expression is a polynomial. If the expression is a polynomial, identify it as monomial,a binomial, or a trinomial. 1.1/5y^3+y^29 2.6g^2h^3k Are these the right answers? Thanks 1.No 2.Yes, monomials.
asked by Shadow 
Physics
A platform rotates at an angular speed of 2.2 rad/s. A block rests on this platform a distance of 0.3m from the axis. (friction coefficient .5) Without any external torgue acting on the system, the block is moved toward the axis. Ignore the moment of
asked by Lola 
math
Nth expression for the following:6,11,17,24,32.....
asked by Daniel 
middle school
Two news helicopters are flying in the same altitude on the way to a political rally. Helicopter A is due 20 miles west of the rally. Helicopter B is 15 mies south and 15 miles each. How far apart is each helicopter? How far from the rally is each
asked by Franklin 
algebra
find all numbers for which the rational expression is undefined 8/x4
asked by Blake 
Chemistry
Calculate the molality of 6.00 M H2SO4 solution. The density of the solution is 1.34 g/mL.
asked by Kari 
math geometry
x^2+y^2=100
asked by Rick 
Chemistry
Which of the following liquids would make a good solvent for iodine, I2? HCl H2O CH3OH NH3 CS2
asked by Kari 
physics
five mole of an ideal gas are kept at a constant temperature of 53 degree celcius while the pressure of the gas is increased from 1 atm to 3 atm calculate the work done by the gas
asked by bed 
trig
Graph three periods of the function. (identify period and phase shift and intercepts) y = f(x) = √3/2 sin(2x)  1/2 cos(2x) if you can't graph it can you at least get it into that simpler form which is graph able.
asked by richard 
8th grade algebra
need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.
asked by Raylen 
8th grade algebra
need ideas of personal experiences to create a mathematical story problem using 4 pictures of this experience and solve the problem.
asked by Raylen