Question

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

Answer 1

Mass of one mole of nitrogen = 28g
We know that, 1 mole of nitrogen contains 6.022 × 10²³ molecules.
Mass of 6.022 × 10²³ nitrogen molecules = 28g
Mass of one molecule of nitrogen = 28 / 6.022 × 10²³ g = 4.64 × 10^-23 grams.
Hence, one molecule of nitrogen weighs 4.64 × 10^-23 grams.