What is the mass per cent of carbon in carbon dioxide?

Options

A. `0.034%`
B. `27.27%`
C. `3.4%`
D. `28.7%`

Answer

B

Explanation

Molecular mass of `CO_(@)=1xx12+2xx16=44g`
1 g molecule of `CO_(2)` contains 1g atoms of carbon
`because 44g "og" CO_(2)` contain C=12 g atoms of carbon
`therefore % "of" C "in" CO_(2)=(12)/(44)xx100=27.27%`
Hence, the mass per cent of carbon in `CO_(2)`is 27.27%