2:09 know the approximate percentages by volume of the four most abundant gases in dry air

2:09 know the approximate percentages by volume of the four most abundant gases in dry air

Air is a mixture of different gases.

The abundance of gases in the air is as follows:

Gas	% by volume
Nitrogen, N₂	78.1
Oxygen, O₂	21.0
Argon, Ar	0.9
Carbon dioxide, CO₂	0.04

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Hydr0Gen2023-09-18T11:05:32+00:00Categories: (c) Gases in the atmosphere, 2 Inorganic chemistry, Edexcel iGCSE Chemistry|Tags: 2:09, Chemistry, Double, GCSE, GCSE_Chemistry_Single, GCSE_Chemistry_SpecPoint, SpecPoint, Topic: Simple Molecules & Covalent Bonding|

Past paper questions on spec point:

Spec	Q'stion	Ans	MS
2:09	Jan '14 (1), Q 3 a i	Answer	MkS
2:09	Jan '14 (1), Q 3 a ii	Answer	MkS
2:09	Jan '14 (1), Q 3 d ii	Answer	MkS
2:09	Jan '16 (1), Q 3 a	Answer	MkS
2:09	May '12 (2), Q 1 a i	Answer	MkS
2:09	May '12 (2), Q 1 a ii	Answer	MkS
2:09	May '12 (2), Q 1 a iii	Answer	MkS
2:09	May '13 (1R), Q 1 b i	Answer	MkS
2:09	May '13 (1R), Q 1 b ii	Answer	MkS
2:09	May '13 (1R), Q 1 b iii	Answer	MkS
2:09	May '16 (1), Q 2 a	Answer	MkS
2:09	May '16 (1), Q 2 b	Answer	MkS
2:09	May '16 (2R), Q 3 a	Answer	MkS
2:09	May '16 (2R), Q 3 b	Answer	MkS