Help with a gas law chemistry problem.?

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dairyqueen_88

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The ideal gas law can be used to calculate the density (mass/volume = g/V) of a gas. Starting with the ideal gas law, PV=nRT, and the fact that n (number of moles of gas) = grams (g) /molecular weight (MW), show that:
Density= g/V=P x MW/RT

I don't even know where to start with this problem. Can someone help?
 
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