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Finding the Number of Moles of Gas

How many moles of nitrogen gas are present in 100cm³ at a temperature of 20.0°C and a pressure of 100kPa? R = 8.31JK^-1mol^-1The ideal gas equation can be rearranged. The pressure is converted to 100,000Pa, the volume is converted to 100×10^-6m³ and the temperature is converted to 293K by adding 273.

This gives n = 0.00411moles

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Specification: AQA Chemistry (7404), AS-level, 3.1.2.3 The ideal gas equation. Topic: Amount of Substance.

Key terms in this lesson

Mole: The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12.
Ideal gas equation: The equation pV = nRT relating the pressure, volume, number of moles and temperature of an ideal gas.

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