How many molecules are present in 16 g of oxygen gas, O2(g)?[Avogadro constant = 6 × 10^23 mol^−1]A)  96 × 10^23 B ) 12 × 10^23 C ) 6 × 10^23 D)  3 × 10^23

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Molar mass of O = 16g/(mol)

Mass of O = 16g

Amount of O moles = 16/16 = 1mol

 

By Avogadro law 1mol of a substance contain `6 xx 10^23` of molecules.

So 1mol of O will contain `6 xx 10^23` molecules.

 

So the answer is `6xx10^23` molecules. Correct answer is C.

 

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