The number of mole of `N_(2)O_(4)` in 276 g `N_(2)O_(4)` are …..

Options

A. 1
B. 2
C. 3
D. 4

Explanation

To find the number of moles of \( N_2O_4 \) in 276 g of \( N_2O_4 \), we can follow these steps:

### Step 1: Identify the formula to calculate moles
The formula to calculate the number of moles is given by:

\[ \text{Number of moles} = \frac{\text{Mass (g)}}{\text{Molar mass (g/mol)}} \]

### Step 2: Determine the molar mass of \( N_2O_4 \)
To calculate the molar mass of \( N_2O_4 \):
- Nitrogen (N) has an atomic mass of approximately 14 g/mol.
- Oxygen (O) has an atomic mass of approximately 16 g/mol.

The molar mass of \( N_2O_4 \) can be calculated as follows:

\[ \text{Molar mass of } N_2O_4 = (2 \times 14) + (4 \times 16) = 28 + 64 = 92 \text{ g/mol} \]

### Step 3: Substitute the values into the formula
Now that we have the mass of \( N_2O_4 \) (276 g) and its molar mass (92 g/mol), we can substitute these values into the formula:

\[ \text{Number of moles} = \frac{276 \text{ g}}{92 \text{ g/mol}} \]

### Step 4: Perform the calculation
Now, we divide 276 by 92:

\[ \text{Number of moles} = 3 \]

### Conclusion
The number of moles of \( N_2O_4 \) in 276 g of \( N_2O_4 \) is **3 moles**.

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