Homework Help: Chemistry

Posted by Help please on Monday, April 5, 2010 at 9:23pm.

I havent been at school for 8 days due to somthing wrong with my heart, but the teachers gave me work. I have no clue how to do them. I really need help please, There all due tomarrow.

Determine the pressure inside a televison picture tube with a volume of 3.5L that contains 2.00 x 10-5g of nitrogen gas at 22.0C?

Chemistry - DrBob222, Monday, April 5, 2010 at 9:37pm
Use PV = nRT
T is in Kelvin.
n = moles = grams/molar mass. Solve for P
Chemistry - Help please, Monday, April 5, 2010 at 9:40pm
okay so what is the R for?
Chemistry - DrBob222, Monday, April 5, 2010 at 9:44pm
R is a constant = 0.08206 L*atm and give pressure in atmospheres. You can change to torr or mm Hg by multiplying atm x 760.
Chemistry - Help please, Monday, April 5, 2010 at 10:18pm
I cant do it, But thank you for trying to help me,
Chemistry - DrBob222, Monday, April 5, 2010 at 10:24pm
n = moles N2 = 2.00 x 10^-5/28 = ??
The PV = nRT
P*3.5L = ??n*0.08206 x (273+22).
Solve for P in atmospheres.

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