Questions Asked on
April 29, 2008

Chemistry 1
What is the chemical equation, name, and formula for the follwing? "When strongly heated, magnesium sulfide formed a yellow crystalline deposit on the walls of a sealed reaction vessel. Metallic deposits were found on the bottom of the container"
asked by Christy 
chem
For the gaseous equilibrium represented below, it is observed that greater amounts of PCl3 and Cl2 are produced as the temperature is increased. PCl5(g) PCl3(g) + Cl2(g) a) What is the sign of S° for the reaction? Explain. b) What change, if any, will
asked by Luke 
Math (geometry)
Find the area of the region inside the circle x^2+y^2=2 AND above the line y=1.
asked by Emily 
chemistry
How many moles of helium gas would it take to fill a balloon with a volume of 1000.0 cm^3 when the temp is 32 degrees C and the atmospheric pressure is 752 mm Hg
asked by jerson 
physics
A curling rock with a mass of 20.0kg slides down a sheet of ice at a speed of 60.0 m/s. What is the kinetic energy of the curling rock? Uhmm, i think the formula is.. Ek= 1/2mv2 Solve?
asked by chyanne 
Algebra
What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a linear
asked by Bobby 
music history
What is the difference between a fugue and a rondo?
asked by ladyE 
PHYSICS
A proton is confined to a nucleus whose diameter is 5.5*10^15m. If this distance is considered to be the uncertainty in the position of the proton, what is the minimum uncertainty in its momentum? I don't really get the uncertainty concept, and how can I
asked by Elaine 
U.S History
1. The organization after WWII that strenghened the militarydefenses of noncommunist western Europe was called? A. NATO B. UNICEF C. WHO D. UNESCO my answer A? Because NATO is a military alliance established by the signing of the
asked by CM 
Chemistry 1 [more detailed]
thanks for the responses but i still don't understand it. I think its more detailed what i have to find now. I have to find the names and correct formula for the reactants and products for the following. "When strongly heated, magnesium and sulfide formed
asked by Christy 
Chels
What can you say about the motion of a body if its veloctiytime graph is a straight line inclined with the time axis? a. the body moves with uniform velocity b.the body moves with uniform acceleration c. the body moves with non uniform acceleration d. the
asked by Physics 
American History
1. Perhaps the most important international result of World War II was a. the emergence of the Cold War. b. Britain's return to world dominance. c. the elimination of Germany from world affairs. d. America's return to isolationism.
asked by CM 
3rd math
which would be the most appropriate unit to measure the length of a marathon race? miles
asked by Sue 
physics
A 200g Nerf dart is shot from a dart gun with a kenetic energy of 3.60J. What was the initial speed of the dart? >>> change g into kg Formula(i think) is: Ek=1/2 mv2 Helppp?
asked by chyanne 
Chemistry
2 H2S (g) + SO2 (g) ƒnƒn3 S (s) + 2 H2O (g) 1) At 298 K, the standard enthalpy change, H¢X, for the reaction represented below is 145 kilojoules. (a) Predict the sign of the standard entropy change, S¢X, for the reaction. Explain the basis foryour
asked by JJ 
Macroeconomics
Economists who work for the government are often called on to make policy recommendations. Why do you think it is important for the public to be able to differentiate normative statements from positive statements in these recommendations?
asked by sabbycat 
statistics
Using the ztable (Table E) find the critical value (or values) for a = .018 left tailed test.
asked by Katy 
math
Find the foci of the ellipse: (x^2/400)+(y^2/625)=1
asked by Jennifer 
biology
what may be a result of inbreeding animals?
asked by Gabreal 
physics
A force of 50.0N is used to stretch an elastic so that it had 40.0 J of elastic potential energy. Through what distance was the elastic stretched? F= 50.0N ?? how do i solve.. ugh!
asked by chyanne 
physics
An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^13 W/m^2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a diameter of 8.5mm and the light has a wavelength of
asked by Koey 
DrBob222
Im in the 10th grade in Chemistry 1 Honors. Im learning to write a chemical equation. Im confuse on that statement i was given for my homework. The products and reactants are just magnesium Sulfide and magnesium and sulfur? Then why are they talking about
asked by Christy 
Chemistry
If you have two containers with water, one with water at 25 degrees C and the second with water 75 degrees C, explain in which one would you be able to dissolve less CO2 (a gas)? Explain in which one you would be able to dissolve more NaCl (check the
asked by Cori 
trig
Find a polar equation of this conic with focus at the pole and the given eccentricity and directrix. e=2, r cos X =1
asked by mindy 
year 7 science
Chemical and physical changes. please could someone help me i need to say whether the following are chemical or physical changes and explain why. I`ve looked myself but i can`t find anything that helps. grateful for any help .thanks Frying an egg , burning
asked by choccy 
Science
What are two conditions thet must be met for sexual reproduction to occur? Why is it important that only one sperm fertilizes the egg? List the following stages of human debelopment in order. (a)Blastula (b)Zygote (c)Fetus (d)Gastrula (e)Morula
asked by Anonymous 
chemistry
If a hot piece of metal (at 80 degrees Celsius) is placed in cold water (10 degrees Celsius), what can you say about the final temperature of the water/metal mixture? If you wanted a more accurate answer, what other information would you need?
asked by jean luc 
physics
An incident Xray photon of wavelength 0.2800nm is scattered from an electron that is initially at rest. The photon is scattered at an angle of 180.0degrees and has a wavelength of 0.2849nm. Use the conservation of linear momentum to find the momentum
asked by Libby 
PHYSICS
The average kinetic energy of an atom in a monatomic ideal gas is given by KE=3/2kT, where k=1.38*10^23J/K and T is the Kelvin temperature of the gas. Determine the de Broglie wavelength of a helium atom (mass=6.65*10^27kg) that has the average kinetic
asked by Elaine 
Algebra
I want to know if this is correct. the question is: Marissa, Cassidy, and Shante went to a school party. Marissa brought 2 bags of Skittles, and Cassidy brought 3 bags of Skittles. Shante forgot to bring candy to the party. Each bag contained the same
asked by Libby 
English
8a. Since American Idol premiered on television, many talented contestants have appeared on the show. 8b. Since American Idol premiered on television, many talented contestants appeared on the show. my answer is A. please explain rationale
asked by Will 
chemistry
Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. fluoroethane from ethanol
asked by Manny 
Physics
Which of Newtons laws would best explain what causes a basketball to bounce? first second third fourth which of Newtons laws would explain the whiplash caused by being rear ended in a car accident? first second third fourth I believe the answer to number
asked by Seana 
math
Find the focus and directrix of the parabola: x=(1/8y^2)(1/2y)+(3/2)
asked by Jennifer 
3rd math
which would be the most appropriate unit to measure the height of a tree? yards
asked by Sue 
Calculus
OK I understand the concept present value but I don't understand how to solve for present value in this context: Assume that you won a local contest for which you gain a continuous income stream at a rate R(t)=5000e^0.1t per year for 5 years and r=0.05.
asked by Alice 
chem
what is the theoretical yield for the balanced equation Ti+2F2= TiF4 if the mass is 0.227 Ti, 0.296 F2?
asked by laurie 
3rd grade math
which would be most appropriate unit to measure the width of a river? miles
asked by Sue 
marketing
Acxiom has many issues to consider regarding how it will grow its business 1. What is the decision facing Acxiom? 2. What factors are important in understanding this decision situation? 3. What are the alternatives? 4 What decision(s) do you recommend? 5.
asked by China 
Chemistry HW Help!
I really need help with the following question.... What is the volume, in liters, of 0.250 mol of hydrogen gas at 20 °C and 0.974 atm pressure? I also would like to let you know that before you can put the numbers into an equation and solve for the
asked by Kiara 
Help! for Chemistry H.W.
I need help with my chem home work. Please show me the answers because this question is a very confusing question to me. Therefore I really need you to provide the answer to this question please... Question 1: A sample of CO2 gas with a mass of 0.30 g is
asked by Lori 
math
How do I write an equation for the ellipse with the following: Foci (9,0) &(9,0) and xintercepts (15,0) and (15,0)
asked by Jennifer 
music
i need 3 facts about vocal music plz help need it soon. BONNIE!!!:)
asked by Bonnie 
Chemistry
If 0.250 moles of NaOH are dissolved in 125g of water, what is the %m/m of NaOH in this solution? I converted 0.250 mol to 10.0 g. Then using the equation mass solute/mass solution * 100 I came up with the final answer of 7.41 %m/m. Is that correct?
asked by Jen 
Economics
Suppose last month's inflation report estimated monthly inflation to be 0.4% over the month. The monetary authorities want inflation to not exceed 2% per year. Estimates of potential output state that our economy is currently near potential output.
asked by Dee 
science
Erin must perform a science experiment. She needs to dissolve 10 g of salt in 250 ml of water. She measures the water incorrectly and dissolves the 10 g of salt in 350 ml of water. Now she has no more salt. Explain what Erin can do to make the solution
asked by astrid 
elements n principles of design
what is the design concept of emphasis
asked by Anonymous 
mistakes?
hm..I was wondering If someone (cough* me) makes mistakes in answering questions, should they bother answering anything at all? Just a thought that crosses my mind alot. =/
asked by ~christina~ 
Leopard Consevation
I am doing a project at school for Science Fair. I need to talk to a expert about the following breeds of leopard, Amur Leopard Clouded Leopard Snow Leopard
asked by Rebecca 
algebra
How do you know if a quadratic equation will have one, two, or no solutions?
asked by Jack 
Chem (Help!)
I need help in using gas laws to solve problems. I need help with this question: What is the pressure in atmospheres exerted by a 0.500 mol sample of oxygen gas in a 10.0 L container at 298 K? Also what formula would I use to solve the pressure in this
asked by Lisa 
Marketing
What decision are Acxiom facing
asked by China 
English  Proof reading
Could someone just proof read this for me and help me make sure the grammar and spelling is correct? Macbeth or the White Witch Uh... What was the Question? I have decided to compare Macbeth to the White Witch from “The Chronicles of Narnia: The Lion,
asked by Chelsey 
French
I posted this earlier, but I switched around the subject and name! Sorry! Here is the original post: Bonjour! For our French class, we are making a French dish and my partner and I have decided to make "Tarte Chocolat Coco" We think that we have a pretty
asked by Brittany 
American History
1. The FivePower Treaty, the FourPower Treaty, and the NinePower Treaty were all attempts to a. establish, or fix, national borders. b. exchange ambassadors. c. ensure international peace. d. lower trade and tariff barriers. my
asked by CM 
American History
1. The organization after WWII that strenghened the militarydefenses of noncommunist western Europe was called? A. NATO B. UNICEF C. WHO D. UNESCO my answer A? Because NATO is a military alliance established by the signing of the
asked by CM 
science
animals that share common charistics
asked by josh 
Chemistry
Calculate the molarity of a solution in which 0.75 moles of a solute are dissolved in 125g of solution (density of solution = 1.05g/mL). I don't even know where to begin.
asked by Lisa 
Chem Home Work Help!
I am a bit confuse with a question from a home work that I need to do by today please help! HW question... 1) A sample of neon gas occupies 8.77 L at 20°C. What is the pressure, in atmospheres, exerted by 1.45 mol of this gas? When you've gotten the
asked by Sujeil 
science
HOW A CUP OF WATER ALLOWS IT TO DISSOLVE MORE SUGAR?
asked by keanna jones 
Chemistry
To neutralize a solution of NaOH and use the least volume of acid, you should select I. 1.0M HCl II. 1.0 M HC(2)H(3)O(2) III. 1.0 M H(2)SO(4) (A) I only (B) II only (C) III only (D) I and II use equal and lesser volumes. (E) I, II, and III use the same
asked by Dom 
College
I have always wanted to go to college from the first moment I understood what it meant to go to college. I look around my small town and I see so many talented people who never had the chance to go to college. Then I look at my family and no one in my
asked by Brittany 
ALGEBRA
_5_ __4m__ m+1 = m My other one was probably very unclear, I hope you can read this better
asked by josh 
Chemistry
How many grams of KF do you need to weigh in order to prepare 500. mL of solution with a concentration of 0.250 M?
asked by Kiley 
medical office
please check my answer thanks Harper Clinic's filing system generates a gap in the filing space when the medical records are moved forward to the most recent assigned medical record number What type of numbering filing system does this clinic use? I think
asked by Maria 
Calculus; Product Rule
Find the value of dy/dx for the given value of x. a) y = (1  2x)(1 + 2x), x = 1/2 y' = 2(1 + 2x) + 2(1  2x) y' = 2 + 4x + 2  4x y' = 4 How do I find the derivative at x = 1/2 if there is no x variable to substitute the x value with? According to my
asked by Anonymous 
math!!
If sin x=.6 and x is in Quadrant 4, find cos x/2 I have no idea how to do it!!!PLEASE HELP!!!!!!!!!!
asked by Shirley 
Physics
If an airplane is moving at a constant velocity of 400 m/s for 20 s, what is its acceleration during this period? 0 m/s squared 20 m/s squared 40.82 m/s squared need more information wouldnt it be need more information because isnt acceleration ending
asked by Greg 
Chemistry
How do you determine the pH of a substance with an H+ concentration of 3.2 x 10^3? Thanks in advance!
asked by John 
algebra
How do you find a quadratic equation if you are only given the solution?
asked by Jack 
math
how do I find the asymptotes of the hyperbola in the following equation: (y^2/81)  (x^2/144)=1
asked by Jennifer 
math
Find the equation of the hyperbola with the following information: vertices at (0,8) and (0,8), foci at (0,9) and (0,9).
asked by Jennifer 
french
wat is "Roberta est americaine.Elle est (blank) dans un secondaire americaine."?
asked by Anonymous 
Report
How did cars influence Al Capone before and after?
asked by Jennifer 
Science
The thing that causes death from AIDS if you have... A)AID B)Blood loss C)Cold
asked by Kenya 
Spanish
Not really a homework question, but more of asking for advice... I'm doing a skit tomorrow with another classmate in spanish and we had to write and memorize(sort of) lines according to a certain scenario. Are there any good techniques to help with my
asked by Cassidy 
research
Discuss the human rights that require protection in research.
asked by Christy 
Spelling
What does the word gem mean i ahve to use it in a sentence
asked by Jordan 
critical thinking
Why and how could you apply critical thinking when evaluating each of the following: Articles Advertising Media Conversations
asked by Jessica 
trig
what is the rectangular equation for r=12/(36cosX).
asked by mindy 
german
Hey guys. This is the last german translation this year, so Id appreciate if you could check it through :) Liebe Freundin! Es ist so lange seitdem, wir einander sehen haben. Die werden sein mehr als fÃ¼nf Jahre nachher. Die Zeit geht so schnell. Aber um
asked by R. Allen 
math
How many feet are in one mile?
asked by jada 
math
what is the derivative of the integral of cos(x^4)+t dt from 2 to sin(x)
asked by lizzy 
chemistry
If A is a nonpolar chemical and B is a nonpolar solvent, what type of solubility (high or low) would you expect between A and B? Is it high solubility?
asked by Kate 
ALGEBRA
__5__ _4m___ m+1 = m What does "m" equal, I can't figure it out, please help me. Here's the question in writing in case it isn't clear: 5 over m+1 = 4m over m Thank you so much.
asked by josh 
books The Family by Mario Puzo
I am writing a roport on this novel and need some help determining the main charaters in the story. so has any one read this novel?
asked by Izzy 
medical office
can you please let me know if there is a website that may help thanks Henery More reviewed medical record 880017 and discovered a missed dose of triazolam on March 10 This type of review is called what
asked by Maria 
math
I don't know what terms are suppose to be conbine with each other or find the lcd in this problem. (3b2)/(b+1)=4(b+2)/(b1)
asked by confuse 
algebra
(2)/(x1)=(x8)/(x+6) please help me with this
asked by please help 
English
15a. Neither the mayor nor the council members have filed their reports. 15b. Neither the mayor nor the council members have filed his reports. my answer is A. what's the rationale please?
asked by Pam 
American History
True of False??? 1. The Soviets desperately wanted the Allies to open a second front in North Africa to relieve German pressure on the Soviet Union. my answer: True Becayse in the autumn of 1942, the Russians were tenaciously holding
asked by CM 
physics is this correct?
An oscillator has an amplitude of 3.2. At this instant the displacement of the oscillator is 1.4. What are the two possible phases of the oscillator at this instant? so i used the equation x=A cos (omega(t) + phase zero) which looks like 1.4=3.2 cos phase
asked by Jessica 
Chemistry
Can you help me with this question? Find the temp for conversion of monoclinic sulfur to rhombic sulfur. This is the data involved: Hf ° (kcal/mol) S(rhombic)=0 S(monoclinic)=0.30 S° (J/K mol) S(rhombic)=31.88 S(monoclinic)=32.55
asked by Alex 
math
Find the equation of the parabola determined by the given information: vertex at the origin, focus at (0,3)
asked by Jennifer 
Brittany
Bonjour! For our French class, we are making a French dish and my partner and I have decided to make "Tarte Chocolat Coco" We think that we have a pretty good idea about how to make this, but could someone give me a translation of this recipe so we don't
asked by French 
communication
Develop Character through communication
asked by sephanie 
Calculus
Let f(x)= 5x  x–2 are we supposed to use the quotient rule? how would we do this. I did the quotient rule and got it wrong. (x2)(5)(5x)(1)  (x2)^2
asked by John 
Adv. Math
I don't know how to do this inequalities.... 24 < 1/2b
asked by Kenya 
Chemistry
Can someone help me with this question? Find the temp for conversion of monoclinic sulfur to rhombic sulfur. This is the data involved: Hf ° (kcal/mol) S(rhombic)=0 S(monoclinic)=0.30 S° (J/K mol) S(rhombic)=31.88 S(monoclinic)=32.55
asked by Alex 
Calculus please help
f(x)=(x^2+2x+3)^4, find f'(x). what rule do we use and can some please show me the steps
asked by John 
research
Discuss the human rights that require protection in research
asked by Christy 
research
what is the biggest barrier for the chronically ill in the United States
asked by Christy 
science
describe the steps in cell mediated immunity.
asked by kendra 
English
8a. Since American Idol premiered on television, many talented contestants have appeared on the show. 8b. Since American Idol premiered on television, many talented contestants appeared on the show. my answer is A. please give me an explanation on the
asked by Pam 
university of nigeria
how do we apply the element and principles of design in design?
asked by deluv 
3rd math
which would you measure using inches? lengh of a pen
asked by Sue 
physics
show that 1/sqrt(Msubscript 0 Esubscript 0)=C...I don't understand how to show this or what this question is asking..its for wave optics
asked by Jessica 
nursing
“Appropriate healthcare is a right.” Do you support or disagree with this statement. Justify your response.
asked by Laly 
physics
It takes a time t=.025s in order for an oscillator to complete one cycle. What is the angular frequency of the oscillator? so i got phase= omega t + phase zero so i got 8Pi/4=.025omega omega=251.33 Is this right?
asked by John 
physics
It takes a time t=.025s in order for an oscillator to complete one cycle. What is the angular frequency of the oscillator? so i got phase= omega t + phase zero so i got 8Pi/4=.025omega omega=251.33 Is this right?
asked by John 
science
what are the major characteristics of protist
asked by clayton 
Calculus please help
Let f(t)=(t^2+3t+8)(2t^2+6). (a) f'(t)= (b) f'(4)=
asked by John 
mathematics
What is 200x3237=
asked by Chicago 
simple math check
(1/2)(3x^2+5x+3)^(1/2)(6x+5) when you plug in 5 for x.. do you get 1.72 because that what i get and then it says im wrong.
asked by John 
physical science
How do heat and work transfer energy?
asked by sam 
science
trace the flow of lymphatic fluid through the body.
asked by kendra 
algebra
can someone help me with this? radical 7v4=radical 5v+10
asked by asia 
Calculus
f(x)=5+(6/x)+(7/x^2), find f'(x). I haven't done fractions without using the quotient rule im not so sure this would work with quotient rule what do i do?
asked by John 
American History
 TRUE of FAlSE??/ 1. The Allies had the upper hand against the Japanese in the Pacific during all of 1942. my answer: True?? ** what does upper hand mean? i don't quite getr the meaning of the question. 2. The Soviet Union established
asked by CM 
human resource management
what would yout ell a friend to convince him or her of the importance of being proactive in one's career development and finding an employer that is career development oriented
asked by carebear 
English
In Posionwood Bible, what does Leah mean by: "Some people will send a breadbutter note after you have them over for dinner. Well, Anatole sent us a boy."
asked by Gloria 
Sci & Tech
I need to write a complex essay and I am having a problem locating a topic that I can get a lot of information from, can anyone help me and give me some options. For my topic I need to choose a technology and a country (not the US)
asked by Andreia 
MATHS
WHAT IS 3X3X4X6X920=
asked by Ewenberg 
algebra 2
(1/9e^6x)^1/2. how do i do this?
asked by Miley 
science
can you help me with a sentence or two  analyze how potential energy is to an objects position and give examples of gravitatinal and elastic potential energy PE  mgh
asked by claire test tommorrow 
organic chemistry
why can't you have 2ethylheptane?
asked by Jay 
bus math with applications
^3+5y^4  x^4 + y^5 i need to find fx, fy (2,4) (5,4)
asked by Pam 
math
how do you find the answer to (2t1)^3 dt on the integral from x^2 to x^3
asked by lizzy 
math
(2)/(x1)=(x8)/(x+6)
asked by connie 
math
(2)/(x1)=(x8)/(x+6) is 7/8 the answer for this question
asked by please help 
science
what are the steps in the formation of an antibody?describe them
asked by kendra 
math with cal
f(xy)= x^2e^3xy find fx fy (1,1) fy (3,3)
asked by Pam 
science
name the stages in gastric function and describe there physiology.
asked by kendra 
3rd math
to measure the height of a basketball, what unit would you most likely use. feet
asked by Sue