A molecule contains five atoms and has a molecular weight of 85 g per mole. the atoms are of elements with atomic numbers 1, 6, and 17. which molecular structure could represent this molecule?

Dichloromethane

Explanation:

As we know the atomic number given belongs to following elements, i. e.

Atomic # Element M. Mass

1 Hydrogen 1 g. mol⁻¹

6 Carbon 12 g. mol⁻¹

17 Chlorine 35.5 g. mol⁻¹

Also the molecular formula of Dichloromethane is,

= CH₂Cl₂

Putting molar masses of each element,

= (12) ₁ + (1) ₂ + (35.5) ₂

= 12 + 2 + 71

= 85 g. mol⁺¹

Result:

Hence the only possible structure containing 5 atoms is Dichloromethane.