Le Chatelier’s Principle: Changing Concentration (Edexcel GCSE Chemistry): Flashcards

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Calculation with gases
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Standard room temp. for gas calculations

20°C

Standard pressure for gas calculations

1 atmosphere

Molar volume at standard conditions

24 dm³ per mole

Formula: moles from volume (dm³)

Moles=Volume (dm³)24\text{Moles} = \frac{\text{Volume (dm³)}}{24}

Formula: volume from moles

Volume (dm³)=Moles×24\text{Volume (dm³)} = \text{Moles} \times 24

Conversion: 1 dm³ to cm³

1000 cm³

First step in gas calculations

Identify known/unknown: volume or moles

Conditions to use 24 dm³/mol

20°C and 1 atmosphere

Unit for volume in gas calculations

dm³

Unit for amount of substance

moles

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