The weight of a molecule of the compound`C_(60)H_(122)` is

Options

A. (a)`1.4xx10^(-21) g`
B. (b)`1.09xx10^(-21) g`
C. (c )`5.025xx10^(23) g`
D. (d)`16.023xx10^(23) g`

Answer

A

Explanation

Molecular weight of `C_(60)H_(122)=12xx60+122xx1`
`=720+122=842`
`:' 6xx10^(23) "molecule" C_(60)H_(122) "has mass" =842 g`
`:.` 1 molecule of `C_(60)H_(122)` has mass `842/(6xx10^(23))`
`=140.333xx10^(-23) g=1.4xx10^(-21) g`.