Calculate the number of molecules in one drop of `H_(2) O` whose mass is `0.05 g`

Explanation

To calculate the number of molecules in one drop of water (H₂O) with a mass of 0.05 g, we can follow these steps:

### Step 1: Calculate the Molecular Weight of Water
The molecular weight (molar mass) of water (H₂O) can be calculated by adding the atomic masses of its constituent elements:
- Hydrogen (H) has an atomic mass of approximately 1 g/mol. Since there are 2 hydrogen atoms in water, the contribution from hydrogen is:
\[ 2 \times 1 = 2 \text{ g/mol} \]
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