Question

The weight of a molecule of compound C60H22 is ??? (Only ans if u are sure).

Answer 1

To calculate the weight of one molecular, the molecular mass of the compound needs to be calculated first.

Molecular mass of C₆₀H₂₂ can be broken down into two steps:
(i) 1 atom of carbon has a mass of 12 amu, so 60 atoms of carbon would have a mass of 12 * 60 = 720 amu.
(ii) 1 atom of hydrogen has a mass of 22 amu, so 22 atoms of carbon would have a mass of 1 * 22 = 22 amu.
∴ Molecular mass of C₆₀H₂₂ = 720 + 22 = 742 amu.

Weight of one molecule
= (Molecular mass) / (Avogadro's number)
= 742÷(6.023*10²³)
= 1.23*10⁻²¹g