Amount of Substance & Gas Volume (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards

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Amount of Substance in Relation to Volumes of Gases
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Molar gas vol at RTP (dm³)

24 dm³ (at 20°C, 1 atm)

Room temp for molar gas vol

20°C

Std pressure for molar gas vol

1 atm

Formula: gas vol from moles

Volume(dm3)=Moles×24Volume (dm^3) = Moles \times 24

Convert dm³ to cm³

Multiply by 1,000

Molar gas vol in cm³

24,000 cm³

MrM_r of NH3NH_3

17

MrM_r of ZnZn

65

Formula: moles from mass

Moles=massMrMoles = \frac{mass}{M_r}

Molar gas vol applies to which gases?

Any gas

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