The weight of a molecule of the compound C60H122 is _______.(A) 1.4 x�

1.	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» Correct option: (A) 1.4 x 10^-21 g Molecular weight of C₆₀H₁₂₂ = 12 x 60 + 122 x 1 = 720 + 122 = 842 ∵ 6 x 10²³ molecules = 842 g 1 molecule = \(\cfrac{842}{6\,\times 10^{23}}\) = 140.33 x 10^-23 = 1.4 x 10^-21 g

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»

Correct option: (A) 1.4 x 10^-21 g

Molecular weight of C₆₀H₁₂₂

= 12 x 60 + 122 x 1

= 720 + 122

= 842

∵ 6 x 10²³ molecules = 842 g

1 molecule = \(\cfrac{842}{6\,\times 10^{23}}\)

= 140.33 x 10^-23

= 1.4 x 10^-21 g