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10-01-2016
Chemistry

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a 2.00 gram sample of helium gas at STP will occupy a volume of

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Willchemistry Willchemistry

10-01-2016

Molar mass Helium ( He ) = 4,0 g/mol

solute = 2,00 g

Number of mols:

n = m / mm

n = 2,00 / 4,0

n = 0,5 moles of Helium

1 mol Helium ------------ 22,4 L STP
0,5 moles ---------------- x L

x = 0,5 . 22,4

x = 11,2 L

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