Calculate the number of molecules/`m^(3)` in an ideal gas at STP.

Explanation

To calculate the number of molecules per cubic meter in an ideal gas at Standard Temperature and Pressure (STP), we will use the ideal gas law and Avogadro's number. Here’s a step-by-step solution:

### Step 1: Understand the conditions of STP
- **Standard Temperature**: 273 K (0 °C)
- **Standard Pressure**: 1 atm = 101.3 kPa = 101300 Pa

### Step 2: Write the ideal gas equation
The ideal gas law is given by the equation:
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