A mixture of `NO_(2)` and `N_(2)O_(4)` has a vapor density of `38.3` at 300 K. What is the number of moles of `NO_(2)` in 100 g of themixture ?

Options

A. `0.43`
B. `4.4`
C. `0.437`
D. `0.437`

Explanation

To solve the problem, we need to find the number of moles of \( NO_2 \) in a 100 g mixture of \( NO_2 \) and \( N_2O_4 \) given that the vapor density of the mixture is 38.3 at 300 K.

### Step-by-Step Solution:

1. **Calculate the Molecular Mass of the Mixture:**
The vapor density (VD) is related to the molecular mass (MM) by the formula:
\[
\text{Molecular Mass} = \text{Vapor Density} \times 2
...