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Chemistry 13 Online
OpenStudy (anonymous):

How many helium atoms are in 12.00g of helium? A: 2.01 x 10^23 B: 6.02 x 10^23 C: 1.81 x 10^24 D: 3.00 x 10^24

OpenStudy (anonymous):

Helium weighs ~4.000 grams / mole. if you have 12g that = 3 moles.........so 3*6.023*10^23 = 1.81*10^24 atoms in 12g of He

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