Avogadro’s Law Calculator
Relates the volume of a gas to the amount of it. Choose what to find; the field for that value is ignored.
Answer
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Both states
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The formula
V₁ ÷ n₁ = V₂ ÷ n₂
At the same temperature and pressure, equal volumes of gas hold equal numbers of molecules.
What to watch out for
Adding gas at constant temperature and pressure increases the volume in proportion.
Frequently Asked Questions
What volume does 1 mol take up if 0.5 mol fills 12 L?
24 L.
Does the type of gas matter?
Not for volume, for ideal behaviour. It does matter for mass, because each gas has its own molar mass.