The vapour density of a mixture containing `NO_(2)` and `N_(2)O_(4)` is `38.3 at 27^(@)C`. Calculate the mole of `NO_(2)` in `100 "mole"` mixture.

Options

A. `33.48`
B. `32.65g`
C. `32 g`
D. `3.2 g`

Answer

A

Explanation

Let moles of `NO_(2)` and `N_(2)O_(4)` be `a` and `b`
respectively: `a+b=100`
`:. 76.6=(axx46+(100-a)xx92)/(100)`
`therefore a= 33.48`