Stephen

The question has a picture:

On one side is 1 liter of H2 gas ------------- the other side is 2 liters of gas X

Both of the gas samples above are at STP. The mass of H2 in one liter is .2 gram. The mass of X in the two liter container is 8 grams. The molecular weight of X is?

10

20

40

60

80

I know the answer is 40. The question is how do you get that answer.

Thank you in advance.

A little help with a question about blood proteins would be appreciated:

Blood proteins are involved in all of the following activities EXCEPT:

A - fighting infection

B - maintaining pH

C - blood clotting

D - maintaining salinity

E - maintaining osmotic balance

Thanks in advance for your help :)

the question is

if 0<=x<=y and (x+y)^2 - (x-y)^2 >=25, what is the least possible value of y?

After foiling and combining like terms, you get 4xy>=25

someone told me to take the square roots of both sides. This gives the correct answer (5/2).

My question is, how does taking the square roots of both sides give you the lowest value for y?

does it matter that the question said that 0<=x<=y?

Thanks, in advance for your help.

If the points F (-2,1), G (1,4), and H (4,1) lie on a circle with a center P, what are the coordinates of the point P?

I know the answer is (1,1) - it is getting this answer I need help with.

Thanks in advance

I would like to know how to solve this math question. I can find the answer from the answer sheet, it's the method of solving I'm looking for.

Thank you in advance :)

If 0<=x<=y and (x+y)^2-(x-y)^>=25, what is the least possible value of y?

If p and n are integers such that p>n>0 and

p^2-n^2=12, which of the following can be the value of p-n?

A - 1

B - 2

C - 4

PS - I know that p^2-n^2 can factor for (p+n)(p-n)

I even know that the answer is A - 1

What I don't understand is how you get to that answer

Please help!

I need help with the steps in the following problem:

n^2-p^2=12

I know that this factors to (n+p)(n-p) = 12

I also calculated that the answer is +/- 2 and +/- 4

What are the steps that get this answer?

Thanks, in advance, for your help

Express 5 sqrt (3x^3) - 2 sqrt (27x^3) in simplest form

The answer sheet says it is -x sqrt (3x) but I don't see how they reached this answer

I greatly appreciate your help. I realize that these types of equations are a pain to display without appropriate notation.

Find all integers n such that 2^n +3^n +4^n +5^n +6^n is divisible by 40

Let a, b, c be the side lengths of a triangle. Prove that the following

inequality holds abc ≥ (2a − b)(2b − c)(2c − a)

Let x, y, z be positive real numbers such that xy+yz+zx ≥

1/(√ x2 + y2 + z2)

Prove that x+y+z ≥ 3.

Verify:

Sin3x=3Sinx-4Sin^3x

I've heard of the following. I'm curious about more.

MOS - mom over shoulder

DOS - dad over shoulder

POS - parent over shoulder

PW - parent watching

c9 - don't know where this comes from