The universal constant that defines the space gas occupies
In short: Why does every gas at room temperature and pressure occupy the same volume per mole? This video breaks down the mathematical bridge between mass, moles, and volume for chemistry students.
At room temperature and pressure (RTP), any gas follows a consistent rule: one mole occupies a volume of 24 dm³. This allows students to convert between the amount of a substance (moles) and its physical space (volume) using a single constant.
The video demonstrates how to navigate multi-step problems, such as converting a known mass into moles using relative formula mass (Mr), and then into volume. It also reveals a shortcut for predicting the volume of a gaseous product directly from a reactant's volume using molar ratios from balanced equations.
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Sources
- Summary by Intellect · source: GCSE Chemistry - Gas Calculations - Volume & Moles | Mass, Moles & Mr (2027/28 exams)
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