The number of moles present in 198 g of HSO is

Options

A. `2`
B. `3`
C. `4`
D. `5`

Explanation

To find the number of moles present in 198 g of HSO, we can follow these steps:

### Step 1: Identify the given mass of HSO
The mass of HSO given in the question is 198 grams.

### Step 2: Calculate the molar mass of HSO
To calculate the molar mass of HSO, we need to sum the atomic masses of its constituent elements:
- Atomic mass of Hydrogen (H) = 1 g/mol
- Atomic mass of Sulfur (S) = 32 g/mol
- Atomic mass of Oxygen (O) = 16 g/mol

Now, we can calculate the molar mass:
\[ \text{Molar mass of HSO} = \text{(1 × 1)} + \text{(1 × 32)} + \text{(1 × 16)} = 1 + 32 + 16 = 49 \text{ g/mol} \]

### Step 3: Use the formula to calculate the number of moles
The number of moles (n) can be calculated using the formula:
\[ n = \frac{\text{given mass}}{\text{molar mass}} \]

Substituting the values we have:
\[ n = \frac{198 \text{ g}}{49 \text{ g/mol}} \]

### Step 4: Perform the calculation
Now, we will perform the division:
\[ n = \frac{198}{49} \approx 4.04 \text{ moles} \]

Since we are looking for the number of moles, we can round this to 4 moles.

### Step 5: Conclusion
Thus, the number of moles present in 198 g of HSO is approximately 4 moles.

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