Question

14. Calculate the actual mass of single molecule of benzene (C6H6)?

Answer 1

Mass of 1 mole of Benzene (C₆H₆) = 78 grams (molecular mass)

But we know, 1 mole of Benzene contains "Avogadro number" of molecules.

→ 6 x 10²³ molecules

Hence we can say that 6 x 10²³ molecules of Benzene weigh 78 grams.

Thus, 1 molecule of Benzene will weigh 78/(6 x 10²³) grams

→ 1.3 x 10⁻²² grams

Hope it helps