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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