Question

The weight of a molecule of the compound C₆₀H₁₂₂ is 

(a) 1.4 x 10^-21 g

(b) 1.09 x 10^-21 g

(c) 5.025 x 10²³ g

(d) 16.023 x 10²³ g

Answer 1

Correct option is (a) 1.4 x 10^-21 g

Molecular mass of C₆₀H₁₂₂ = 60 x 12 + 122 = 822

6.023 x 10²³ molecules of the compound weigh 822 g 

1 molecule of the compound weigh \(\frac{822}{6.023\times 10^{23}}\) = 1.4 x 10^-21 g