ihatericksteves

And just throw it on the ground and stomp on it repeatedly?

Molarity (M) = mol solute/L of solution

Molality (m) = mol solute/kg solvent

Benzoyl Peroxide: C14 H10 O4

MW = 242.22 g/mol

Acetonitrile: C2H3N

MW = 41.054 g/mol

1) What is the molarity of a solution containing 3 atoms of benzoyl peroxide in acetonitrile with a cell volume of 7.455 cubic micrometers?

-> To save time, 7.455 cubic micrometers = 7.455 x 10^(-15) L

2) What is the molality of benzoyl peroxide in this solution if the density of the solution is 0.786 g/cm^3?

-> to save time, 0.786 g/cm^3 = 0.786 kg/L

Any help would be greatly appreciated. I understand how to do the first question only halfway, and then the second question relies on the first, so I'm stuck.

I always give out a best answer ASAP. Thanks for all the help!

I was wondering if anyone could help me out with this. This is a problem that involves finding the arc length of parametric curves.

Find the exact length of the curve y = (x/2)^2/3 from x = 0 to x = 2. Hint/reminder: the choice of suitable parametrization is very important!

If anyone could do this and show how they did it , that would be greatly appreciated. What's really throwing me off is the (x/2)^2/3. I've always had trouble with derivatives/anti-derivatives.

I will best answer ASAP.

If someone could help me with this, it would be great. I'll give best answer immediately to anyone who gets it.

I need to show all the steps for evaluating this function:

the integral from 0 to Pi/2 of 1/((1+tan^(sqrt(2009))(x)))

or, here's a picture of the function, since that ^ is a little difficult to decipher:

http://img170.imageshack.us/img170/7428/equation.j...

*please note: all steps have to be shown*

Normally I'd use a program like Maple to evaluate it, but it doesn't show steps.

If it helps, I plugged it in to Maple and got 0.7853981634 as the answer. But I'm not sure if that's even right.

Thanks for your help.

2 + 2 = ?

Maybe it's just me, but there's just so many of these juvenile inquiries all asking the same thing with the same conditions. It's like middle school all over again. I was wondering if anyone else on answers was thinking the same thing.