Questions Asked on
May 23, 2008

chemistryplease check my work
Determine the mass of carbon monoxide that is produced when 45.6 g of methane CH4 react with 73.2 g of oxygen gas, O2. The products are CO and H2O. Please check my work: CH4 + 3O2 > 2CO + 2H20 nCH4=2.84 mol nO2=4.58 mol Limiting Reactant: 1 mol CH4/2.84
asked by Sarah H 
chemistry
calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^24 C atoms or should it be 28.11 x 10^23 C atoms? 5.62 X 10^24 N atoms or should it be 9.34 x 10^23 N atoms? 1.69 x 10^25 O atoms....but are you allowed to do ^25 or should it be 168.7 X
asked by Sarah 
math (need help badly)
the vertices of triangle DEF are D(5,12)and E(2,7) and F(8,4) Triangle DEF undergoes an enlargement with the centre ,O, and scale factors k.Its image is D`E`F` where D(5,12)arrow D`(7.5,18) a)How do i detremine the value of k
asked by rita 
geography
hi guys , anyone having trouble finding info about broughton airbus. i know people have asked before but i can`t find the answers to my questions. the question i`m finding hard is what alterations have been made to the factory? thanks for helping me . ive
asked by nicole 
Electric Field between concentric cylinders
I wanted the electric field between concentric cylinders, and got anexpression using Gauss' Law that considers only charge enclosed. Thus, there was no influence due to the outer cylinder. But, if we consider the limiting case of the inner cylinder having
asked by Samantha Green 
math
the position vectors of A and B relative to the origin are a and b repsectively The point P is on OA such that PA=2PA So my question is if B is the top of the triangle and O represent the left corner of the triangle and A the right corner, where would
asked by angelina 
Economcis
I need some help on the following question, thanks. e = euros Suppose quotes for the dollareuro exchange rate, E$/e, are as follows: in New York $1.50 per euro, and in Tokyo $1.55 per euro. Describe how investors use arbitrage to take advantage of the
asked by Wilde 
Physics
Calculate the change in momentum in each of the following situations and state the direction of the change in momentum. a) A 4kg bowling ball strikes a stationary pin headon at a speed of 3m/s. It continues to move in its original direction, but its speed
asked by Alex 
geography
hi guys , anyone having trouble finding info about broughton airbus. i know people have asked before but i can`t find the answers to my questions. the question i`m finding hard is what alterations have been made to the factory? thanks for helping me . ive
asked by nicole 
PreAlgebra
Hi, Well, I have a test tomorrow and I was hoping that's someone could maybe help me? I don't understand probability... Here's a question I don't understand: Find the probability of tossing three coins and getting only two tails. Can anyone help?
asked by Lily 
math
how do i solve the equation for x and y y+4x=27 xy+x=40
asked by ralph 
math
On a vacation in cananda steve used his credit card to buy a camera for Can $250.00 trinirose: What is the value of the camera in Ja $. a)I know the asnwer is $18,125 Ja dollars b)steve has a credit limit of Ja $30,000.00.After buying the camera,how many
asked by kelly 
chemistry  empirical formula
write the empirical formula for each of the following molecular formulae" a)P4O10 b)C2H6 Confused as to what the diff.is b/w empirical and formula...have no idea how to answer these b/c they look like empirical formulas to me
asked by Sarah 
psy info  help
Ms. Sue, Could you tell me where I can get this information: Sternberg, eight general types of love. Thanks.
asked by rose Ms. sue 
Econ
What kinds of information would you have needed to try to determine whether a company is a monopoly and why is this information important?
asked by Tiffany 
math (vectors)
calculate the length of AN if a{6} {2} and b= {1} {2} Is it 6^2+4^2 36+16=52 square root of 52+7.211
asked by thomas 
history
Who is roberto clemente?
asked by Jake 
Chemistry  please help
Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 > 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /
asked by Sarah H 
Math
Ok, I'm lost on this.... The equation D=1.2 gives the distance, D in miles that a person can see to the horizon from a height h in feet. Solve this equation for h
asked by Sahara 
History
What did people drink during the Renaissance? Did they drink water?
asked by Danielle 
Reading
Is there any flowers that rhymes with journal??????
asked by Serena 
Algebra
Solving quardratic equations using factoring. 2X^2+2X4=0 The book says the answer is 2,1. I got the 2,1 but not in the order of 2,1. I used FOIL to solve. When I use 2,1 I don't can not solve. When I use 1,2. I can solve. I am not clear.
asked by G 
written communication
Ironing out all wrinkles, the pants looked much more presentable
asked by Anonymous 
science
why is the electron the part of the atom that moves when an electric current flows?
asked by jacob 
health
what range of health care benefits are covered by Medicare and Medicaid?
asked by Tim 
Social Studies
Whos is Nelson Mandela? FW de Klerk? How did they impact apartheid?
asked by Logan 
geography
do you know which sites tell you about what happens to the parts when they go to the toulouse airbus factory? thanks Ms.Sue for you help i appreciate it.
asked by nicole 
Chemistry  please help
Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS = 7O2 > 2Fe2O3 + 2SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS /
asked by Sarah H 
Math
What would be considered as a competitive interest rate and was is a compeititve interest rate?
asked by Lina 
mathmetics
x213x+30
asked by roj 
public policy development
I need to write a sentence outline showing how an agency creates goals and objectives.
asked by Anonymous 
CRITICAL THINKING
Why and how could you apply critical thinking when evaluating each of the following: • Articles • Advertising • Media • Conversations
asked by LATASHA 
MAT 116
solve 59X81>3x+215
asked by Shelly k 
maths
x and y are two matrices x= {2 0} and y {4 1} {5 1} {3 7} evaluate x^2+y is the ans={8 1} {18 8}
asked by chantel 
education inequalities
What are some inequalities in education between men and women?
asked by Katherine 
religion
Why did martin luther king responde the way he did to poeple
asked by Nanci 
chemistry
We're studying acids and bases; the question states that 50mL of 0.1M HNO3 solution is mixed with 25mL of 0.1M NaOH. What is the pH? I thought that I would use the HendersonHasselbach equation; but my answer does not match the one give in the solution.
asked by micole 
french
The use of the pronouns y and en is confusing, i know y is used for a place, but also with certain verbs followed by "a": pense a...for example. How do i know i don't use other direct or indirect object pronouns. Same for "en", when do i use it and when do
asked by french 
calculus
Find lim (with x¨‡ under it) (x^21)/x or state that the limit does not exist. I'm so lost with what to do with limits...I tried to simplify the expression to lim x+lim 1/x, but from there I'm pretty dumbfounded. If anybody could help me out I'd
asked by Lisa 
M116
59x  81 > 3x + 215
asked by shelly,k 
Biology
How are the lungs and the liver in a frog different from those of a human? Thanks (other than being smaller)
asked by Joe 
AED
can anyone help me with my introduction to the fallowing please: Many teachers leave the profession after their first year as an educator. Examine programs that encourage individuals to stay in the profession of teaching and lower the attrition rate.How
asked by dawn 
Reading
Thanks if anybody can help me!! I need some words that rhymes with journal. Thanks!!!!!!!!!!!1
asked by Serena 
french
CAn someone proof read this? Nous sommes allées au Musée des Tissus et des Arts Décoratifs à onze heures. L’adresse a été 34, rue de la Charité, Lyon, France 69002. Nous avons vu des textiles du dixhuitième siècle et il y avait des tableaux par
asked by kate 
algebra
I am having a hard time solving my problem 2ã20 + 5 ã 80  7 ã5 Can someone please help me
asked by Teena 
science
Provide at least three freshwater and three ocean water resource challenges
asked by Andrea 
mathematics: algebra;equations
wuts the answer for 12 + 5u= 48
asked by alisa 
algebra
I am having a hard time solving my problem 2ã20 + 5 ã 80  7 ã5 Can someone please help me
asked by Teena 
history
When was the statue of zeus at olympia made? How was it made?
asked by logan 
history
How whas the statue of zues made? i cant find it on google or anything. i also prefere to not use wikipedia.
asked by logan 
health care
health care benefits covered by Medicare and Medicaid?
asked by Laura 
Algebra
The instruction manual on the industrial oven suggests your oven temperature will increase by 45 degrees Fahrenheit per minute. When the over is initially turned on, the temperature is 70 degrees Fahrenheit. What will the temperature of the oven be after 7
asked by yolanda 
Economics
How do you do the portfolio worth part 2?
asked by Alayna 
History
What was the type of currency during the renaissance?
asked by Danielle 
Talent Shows
In class I have to do a talent show. If I learn karate from my friend do YOU think that is okay for a talent show?
asked by Anonymous 
medical
What does ROS stand for?
asked by cindy 
medical
A physical or mechanical device used to remove health hazards form the workplace is called a _______ control.
asked by cindy 
algebra
The problem did not come out correctly here it is again 2 with the square root of 20 plus 5 with a square root of 80 minus 7 with a square root of 5
asked by Teena 
Math
Vivica washhes 6 cars in 60 minutes. How many minutes does it take Vivica to wash one car?
asked by Nenny