Use pV = nRT in calculations involving gases.

In the subtopic The ideal gas equation, this AQA A-Level Chemistry 7405 learning objective focuses on use pV = nRT in calculations involving gases. It belongs to Amount of substance, so revision should stay anchored to this exact subtopic rather than drifting into a generic GCSE-level chemistry summary. Approved keywords to use include involving, gases, calculations. Ideal Gas Equation. means the equation pV = nRT relates pressure (p), volume (V), number of moles (n), ideal gas constant (R), and temperature (T) for an ideal gas Avoid the mistake of students often incorrectly rearrange the ideal gas equation pV = nRT, leading to wrong calculations of pressure, volume, or temperature; instead, to correctly rearrange the ideal gas equation, identify the variable you need to isolate. For example, to find volume (V), use V = nRT/p. Substitute the known values into the equation, perform the calculations, and ensure your final answer includes the correct units (dm³ for volume) For exam answers, always start by writing down the ideal gas equation: pV = nRT. Make sure to convert all units to SI before substituting values