A cylinder contains 68 g of ammonia gas at S.T.P.
What is the volume occupied by this gas?

Explanation

To find the volume occupied by 68 g of ammonia gas at Standard Temperature and Pressure (S.T.P.), we can follow these steps:

### Step 1: Determine the molar mass of ammonia (NH₃)
The molar mass of ammonia (NH₃) can be calculated as follows:
- Nitrogen (N) has a molar mass of approximately 14 g/mol.
- Hydrogen (H) has a molar mass of approximately 1 g/mol, and there are three hydrogen atoms in ammonia.

Calculating the molar mass:
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