What is the molar mass of a substance, each molecule of which contains 9 carbon atoms, 13 hydrogen atoms and `2.33xx10^(-23) g` of other component?

Options

A. `235.04 g`
B. `153.03 g`
C. `135.04 g`
D. `253.04 g`

Answer

C

Explanation

Molecule has C,H and other component
Mass of 9 C atoms `=12xx9=108 "amu" " "` Mass of 13 H atoms `=13xx1=13 amu`
Mass of `2.33x10^(-23) g` of other atom
`=(2.33xx10^(-23))/(1.66xx10^(-24))=14.04 amu" ":.` Total mass of one molecule
`=108+13+14.04=135.04amu" " :.` molar mass `=135.04 g`.