If one mole of nitrogen molecules weighs 28 g, calculate the mass of one molecule of nitrogen in grams. 

Posted by Pratham Srivastav (Jan 12, 2017 2:48 p.m.) (Question ID: 1311)

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  • Answer: The mass of 1 atom = Gram atomic mass of atom/ 6.022 × 1023

    So, the mass of 1 atom of nitrogen = Gram atomic mass of nitrogen atom/ 6.022 × 1023 = 28g/ 6.022 × 1023 =

    4.65 × 10-23 g

    Answered by Payal Singh (Jan 12, 2017 3:22 p.m.)
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  • Ans. Molar mass of a substance is a mass of 6.023 X1023 molecules.

    Molar mass of nitrogen molecule i.e N is 2 X14 = 28 g.

    Thus 6.023 X 1023 molecules weigh = 28 g

    1 molecule of nitrogen weighs = 28/6.02 X 1023 = 4.65 X 10-23 g

    Answered by Naveen Sharma (Jan 12, 2017 3:18 p.m.)
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