gases in the atmosphere Flashcards
page 38
1
Q
what are the four most abundant gases in dry air?
A
nitrogen, oxygen, argon and carbon dioxide
2
Q
which gas makes up about 78% of the atmosphere?
A
nitrogen
3
Q
what percentage of the atmosphere does oxygen make up?
A
21%
4
Q
what percentage of the atmosphere does argon make up?
A
nearly 1%
5
Q
what percentage of the atmosphere does carbon dioxide make up?
A
0.04%
6
Q
how can you use iron to investigate the proportion of oxygen in the air?
A
iron reacts with oxygen in the air to form rust- so iron will remove oxygen from the air.
7
Q
what formula do you use to calculate the percentage of oxygen?
A
(start volume - final volume/ start volume) times 100
8
Q
what other element can you use to determine the percentage of oxygen in the atmosphere?
A
phosphorus
