(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Calculate the mass of nitrogen dissolved at room temperature in a 92.0 L home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.

2. Relevant equations

[tex]PV=nRT[/tex]

3. The attempt at a solution

[tex]P_{total}=1 atm[/tex]

[tex]P_{N}=.78 atm[/tex]

[tex]V=92L[/tex]

So here is what I did:

[tex]n=\frac{PV}{RT} = \frac{(.78)(92)}{(.08206)(298.15)}[/tex]

[tex]n=2.93303[/tex]

[tex]mass = (2.93303 mol)\frac{28.02g}{mol}[/tex]

[tex]mass = 82.1834g[/tex]

This is an online homework assignment and it keeps rejecting my answer. It only wants two sig figs. Any ideas where I am going wrong? Thanks in advance.

Joe

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# Homework Help: Calculate the mass of nitrogen dissolved

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