The number of moles present in 128 g of HSO is

Options

A. 2.6
B. 3.47
C. 4.6
D. 5.5

Explanation

To find the number of moles present in 128 g of HSO, we can follow these steps:

### Step 1: Determine the molar mass of HSO
- The molar mass of HSO can be calculated by adding the atomic masses of its constituent elements:
- Hydrogen (H): 1 g/mol
- Sulfur (S): 32 g/mol
- Oxygen (O): 16 g/mol

\[ \text{Molar mass of HSO} = \text{mass of H} + \text{mass of S} + \text{mass of O} = 1 + 32 + 16 = 49 \text{ g/mol} \]

### Step 2: Use the formula to calculate the number of moles
- The number of moles (n) can be calculated using the formula:

\[ n = \frac{\text{given mass}}{\text{molar mass}} \]

- Here, the given mass of HSO is 128 g, and the molar mass we calculated is 49 g/mol.

\[ n = \frac{128 \text{ g}}{49 \text{ g/mol}} \approx 2.61 \text{ moles} \]

### Conclusion
The number of moles present in 128 g of HSO is approximately 2.61 moles.

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