- #1

Felchi

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## Homework Statement

60 L of N

_{2}are collected over H2O at 40

^{o}C when atmospheric pressure is 760.00 torr. What is partial pressure of N

_{2}?

## Homework Equations

PV=nRT

P

_{t}=P

_{1}+P

_{2}...

Vapor pressure of H

_{2}O at 40

^{o}C:7.3590 KPa

760 torr=101.3 kPa

40

^{o}C=313

^{o}K

## The Attempt at a Solution

PV-nRT

(60)101.3=313(n)8.3145

((60)101.3)/((313)8.3145)=2.166g...That doesn't help, mass of H

_{2}O unknown.

P

_{t}=P

_{1}+P

_{2}?

P

_{t}=101.3kPa+P

_{N}...P

_{t}is not given...doesn't work.

Cannot assume P

_{t}is ambient pressure because container's height affects pressure.