Estimate the speed of sound in air at standard temperature and pressure. The mass of 1 mole of air is `29.0xx10^(-3)kg`, `lambda` for air `=7//5`.

Explanation

To estimate the speed of sound in air at standard temperature and pressure, we can follow these steps:

### Step 1: Understand the Given Data
We are given:
- Mass of 1 mole of air, \( m = 29.0 \times 10^{-3} \) kg
- The value of \( \lambda = \frac{7}{5} \)
- Pressure at standard temperature and pressure, \( P = 1.01 \times 10^{5} \) N/m²
- Volume of 1 mole of gas at STP, \( V = 22.4 \) liters = \( 22.4 \times 10^{-3} \) m³
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