If 1 g of each of the following gases are takes at STP, which of the gases will occupy (a) greatest volume and (b) smallest volume ?
`Co, H_(2)O, CH_(4), NO`

Explanation

To determine which gas occupies the greatest and smallest volume when 1 gram of each gas is taken at STP (Standard Temperature and Pressure), we need to calculate the volume occupied by each gas using their molar masses. Here’s the step-by-step solution:

### Step 1: Calculate the Molar Mass of Each Gas
1. **Carbon Monoxide (CO)**:
- Molar mass = Atomic mass of C + Atomic mass of O = 12 g/mol + 16 g/mol = 28 g/mol.

2. **Water (H2O)**:
- Molar mass = 2 × Atomic mass of H + Atomic mass of O = 2 × 1 g/mol + 16 g/mol = 18 g/mol.
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