A flask has a volume of and contains air at a temperature of and a pressure of .

PHYSICS · Multi-part · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

A flask has a volume of 5.0×10−4 m35.0 \times 10^{-4} \text{ m}^3 and contains air at a temperature of 300 K300 \text{ K} and a pressure of 150 kPa150 \text{ kPa} . (1) Calculate the number of moles of air in the flask. (2) Determine the number of molecules in the flask. (3) Estimate the mass of air in the flask. You may take the molar mass of air to be 29 g mol−129 \text{ g mol}^{-1} .

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