A certain mass of dry gas at `27^(@)C` and `760 mm` pressure has density `28`. What will be its density at `7^(@)C` and `740 mm`?

Explanation

To find the density of a certain mass of dry gas at a different temperature and pressure, we can use the relationship derived from the ideal gas law. Let's go through the solution step by step.

### Step 1: Understand the relationship between density, pressure, and temperature
The density (D) of a gas can be expressed using the formula derived from the ideal gas law:
\[ D = \frac{PM}{RT} \]
Where:
- \( D \) = density of the gas
- \( P \) = pressure of the gas
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