What volume of oxygen gas `(O_(2))` measured of `0^(@)C` and `1 am` needed to burn completely `1 L` of propane gas `(C_(3) H_(8))` measured under the same conditions?

Options

A. `5 L`
B. `7 L`
C. `10 L`
D. `6 L`

Answer

A

Explanation

Accrosing to balanced equation,
`underset(1 mol)(C_(3) H_(8) (g)) + underset(5 mol)(5O_(2)(g)) rarr underset(3 mol)(3 CO_(2)(g)) + underset(4 mol)(4H_(2) O(g))`
According to Avogadro's law, `V prop n` under the same conditions. Thus, `1 L` of `C_(3) H_(8)` will react with `5L` of `O_(2)`.