Mass of 1 atom of Hydrogen is -

Options

A. `1.66 times 10^(-24)g`
B. `10^(-22)g`
C. `10^(-23)g`
D. `10^(-25)g`

Answer

To find the mass of one atom of hydrogen, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Atomic Mass of Hydrogen**:
The atomic mass of hydrogen (H) is approximately 1 gram per mole (g/mol). This means that 1 mole of hydrogen atoms has a mass of 1 gram.

2. **Use Avogadro's Number**:
Avogadro's number (Na) is \(6.022 \times 10^{23}\) atoms/mole. This number tells us how many atoms are present in one mole of a substance.

3. **Calculate the Mass of One Atom**:
To find the mass of a single hydrogen atom, we can use the formula:
\[ \text{Mass of one atom} = \frac{\text{Atomic mass}}{\text{Avogadro's number}} \]
Substituting the values:
\[ \text{Mass of one atom of H} = \frac{1 \text{ g/mol}}{6.022 \times 10^{23} \text{ atoms/mol}} \]

4. **Perform the Calculation**:
\[ \text{Mass of one atom of H} = \frac{1}{6.022 \times 10^{23}} \approx 1.66 \times 10^{-24} \text{ g} \]

5. **Final Result**:
The mass of one atom of hydrogen is approximately \(1.66 \times 10^{-24}\) grams.