How many molecules are there in 14 g of nitrogen at s.t.p.? [N = 14, Avogadro's constant = 6.02 x 1023 mol-1]

How many molecules are there in 14 g of nitrogen at s.t.p.? [N = 14, Avogadro's constant = 6.02 x 10²³ mol^-1]

A 6.02 x 10²³
B 3.01 x 10²³
C 8.43 x 10²⁴
D 1.20 x 10²⁴

waec 2009 chemistry

The correct answer is A. 6.02 x 10²³

No explanation given

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