The mass of 750 mL of a gas collected at 25°Cand 716.2 mm pressure is found to be equal to 0.809 g. Calculate the molecular mass of the gas.

Explanation

To calculate the molecular mass of the gas, we can follow these steps:

### Step 1: Convert the given temperature to Kelvin
The temperature given is 25°C. To convert this to Kelvin, we use the formula:
\[ T(K) = T(°C) + 273.15 \]
Thus,
\[ T = 25 + 273.15 = 298.15 \, K \]

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