jwild1315 jwild1315

15-07-2017
Chemistry

contestada

A helium balloon contains 0.54 g of helium. given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?

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dec77cat dec77cat

15-07-2017

m(He)=0.54 g
M(He)=4.0 g/mol

n(He)=m(He)/M(He)

n(He)=0.54/4.0=0.135 mol

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