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To find the percent composition of hydrogen (H) in the sample of HNO3, we can follow these steps:

1. Determine the masses of the individual elements in HNO3:
- Mass of Hydrogen (H): 1.01 grams
- Mass of Nitrogen (N): 14.01 grams
- Mass of Oxygen (O): 48.00 grams

2. Calculate the total mass of the HNO3 sample:
\(\[ \text{Total mass} = \text{Mass of H} + \text{Mass of N} + \text{Mass of O} \]\)
\(\[ \text{Total mass} = 1.01\, \text{g} + 14.01\, \text{g} + 48.00\, \text{g} = 63.02\, \text{g} \]\)

3. Calculate the percent composition of Hydrogen (H):
\(\[ \text{Percent composition of H} = \left( \frac{\text{Mass of H}}{\text{Total mass}} \right) \times 100 \]\)
\(\[ \text{Percent composition of H} = \left( \frac{1.01}{63.02} \right) \times 100 \approx 1.60\% \]\)

Therefore, the percent composition of hydrogen (H) in the sample of HNO3 is approximately 1.60%.

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