Science & Mathematics - 1 February 2007

i keep doing this problem but my answer sheet saws the answer is wrong...how do you solve it?

Bromine and chlorine gases react to produce bromine monochloride according to the equation below. The equilibrium constant, Kc for the reaction is 36.0 under the conditions of the experiment.
Br2(g) + Cl2(g) <=> 2 BrCl(g)
If 0.180 moles of Br2(g) and 0.180 moles of Cl2(g) are introduced into a 3.0 L flask and allowed to reach equilibrium, what is the equilibrium molar concentration of BrCl(g)?

2007-02-01 13:44:53 · 1 answers · asked by Anonymous in Chemistry

In a lottery, 3,000,000 tickets are sold each week for 50 cents apiece. Out of those 3,000,000 tickets, 12,006 are drawn at random and without replacement and awarded prizes: twelve thousand $25 prizes, four $10,000 prizes, one $50,000 prize, and one $12,000 prize. If you purchased a single ticket each week, what is the expected value of this game to you?

2007-02-01 13:44:25 · 3 answers · asked by Anonymous in Mathematics

Most populations on earth are affected by several factors, such as genetic drift, mutations, and natural selection. Which of the following statements can be made about a population that experiences changes in gene frequencies?
A.
The Hardy-Weinberg equilibrium is maintained.

B.
Evolution is occurring in the population.

C.
Lethal genes will eventually be expressed.

D.
Mutations will not affect the population.

2007-02-01 13:43:53 · 3 answers · asked by mike 1 in Biology

Estimate percent

12% of 72

How do you do 33 1/3% of 24

2007-02-01 13:41:52 · 7 answers · asked by Anonymous in Mathematics

2007-02-01 13:41:42 · 5 answers · asked by mon 1 in Engineering

simplify
3 - sqrt [16] +5 ^2

2007-02-01 13:40:25 · 5 answers · asked by chickiejam 1 in Mathematics

Explain

2007-02-01 13:39:29 · 9 answers · asked by Lilah 1 in Astronomy & Space

P = 2 times pie times r + 2x

Slove to r

P = 440yd
x = 110yd

everytime i do this i get a different answer ... what do you get?

2007-02-01 13:38:51 · 6 answers · asked by *Sweetie* 3 in Mathematics

#51-- The answer should be x+1 over x^2(3+x), but I have -x+1 over x^2(3+x). (Disregard the weird thing I have in front of it).

#61-- The answer is 6 over x^2. I have -10+6 over x^2.

#62-- I don't have the answers to even numbers, and would appreciate if someone could tell me if it is right or wrong.

Thanks!

2007-02-01 13:38:01 · 2 answers · asked by lirael1019 1 in Mathematics

if an interior angle of regular polygon is 172 degrees then how many sides does it have? what is the formula?...

2007-02-01 13:37:02 · 3 answers · asked by Anonymous in Mathematics

1.)A 10-kg crate and a 100-kg crate are both sliding without friction down a plane inclined at 20 degrees with the horizontal. What is the acceleration of each crate?

2.)A box slides down a frictionless plane that makes an angle of 35 degrees with the horizontal. A horizontal force of half the box's weight process the box against the plane. what is the boxes acceleration?

2007-02-01 13:35:34 · 1 answers · asked by 94z6ex 1 in Physics

2007-02-01 13:35:15 · 9 answers · asked by gemma angel m 1 in Medicine

Classify

2007-02-01 13:35:08 · 1 answers · asked by Lilah 1 in Astronomy & Space

For the lunch special, a cafe offers 2 soups, 3 salads, 4 entrees, and 2 desserts.

a.) How many different lunch specials can you have if you lunch consists of soup, salad, entree and dessert?

b.) How many different lunch specials can you have if lunch consists of soup OR salad, entree and dessert?

2007-02-01 13:34:54 · 5 answers · asked by unicarel 2 in Mathematics

2x-3y=6
2x+y=-10

2007-02-01 13:33:11 · 2 answers · asked by Anonymous in Mathematics

2007-02-01 13:33:02 · 2 answers · asked by *Sweetie* 3 in Mathematics

True or false?..." when sample sizes are equal, the mean square between is equivalent to the variance estimate of the sample means multiplied by n to reflect the number of scores on which each mean is based"...is this statement true or false>??/

2007-02-01 13:32:30 · 1 answers · asked by Anonymous in Mathematics

Explain

2007-02-01 13:32:15 · 1 answers · asked by Lilah 1 in Astronomy & Space

Because of losses by your employer, you agree to accept a temporary salary decrease of 10%. Your employer promises to give you a 10% pay raise in 6 months. Will the pay raise restore your original salary?

2007-02-01 13:31:43 · 6 answers · asked by unicarel 2 in Mathematics

2007-02-01 13:30:42 · 14 answers · asked by Anonymous in Weather

On August 15, 2006, the exchange rate was 10.8164 Mexican pesos for one US dollar. How much US money do you need to purchase 1,000 Mexican pesos?

2007-02-01 13:28:39 · 3 answers · asked by unicarel 2 in Mathematics

i want this answer for a science project sooooooooo please help me

2007-02-01 13:28:07 · 5 answers · asked by Jenny 1 in Earth Sciences & Geology

a. the number of feet in 132 inches?

b. the number of yards in 15 feet?

c. the number of miles in 10,560 feet?



-please answer each if you can. your help would be GREATLY appreciated. :) answer each with with a. b. c. shown in front. like its shown above. please.


thanks, Morgan.

2007-02-01 13:27:22 · 9 answers · asked by southern_hillbilly_babe06 1 in Mathematics

Why should the properties of structural isomers differ?

2007-02-01 13:27:16 · 3 answers · asked by Master 2 in Chemistry

A collection of jewlry includes two rings, one 18 years old and the other 46 years old. In how many years will the older ring be twice as old as the newer ring.

Ok I already have the answer to this problem, so thats not my problem. I really WANT to know how you do this problem so if you know how to solve this in the uhh....algebraic way please help me. Explain how you got the answer that you got and show your steps please. I will withhold the answer to this math question and choose the first person who gets it right and shows how they did it as the best answer. PLEASE HELP ME AS SOON AS POSSIBLE!

2007-02-01 13:27:13 · 5 answers · asked by Anonymous in Mathematics

2007-02-01 13:25:35 · 1 answers · asked by Anonymous in Mathematics

2007-02-01 13:24:25 · 12 answers · asked by Milissa s 1 in Mathematics

I've heard that people from the Basque region of Spain and France have an extra rib. A friend of mine went to the doctor, who asked him whether he was a Basque, just by looking at an XRay. My friend is in fact Basque and doesn't think this was a coincidence.

2007-02-01 13:23:25 · 5 answers · asked by bulgariangoddess 1 in Biology

2007-02-01 13:21:11 · 4 answers · asked by Anonymous in Chemistry

An electron with speed v0 = 29.5 106 m/s is traveling parallel to an electric field (v0||E) of magnitude E = 11.9 103 N/C.
(a) How far will it travel before it stops?
in cm
(b) How much time will elapse before it returns to its starting point?
in nano sec

2007-02-01 13:21:02 · 3 answers · asked by webogirl 2 in Physics