PV=nRT n= moles of HE + moles H2
think about that. If you have studied Dalton's Law of Partial Pressures, it makes perfect sense...each gas has a partial pressure, and the sum of them is .985atm
What volume does a mixture of 14.2 g of He and 21.6 g of H2 occupy at 28 degrees celcius and 0.985 atm?
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