Chemistry gases in air

Question 1

What gases make up air? Include their percentages.

Answer 1

Nitrogen 78%
Oxygen 21%
Argon about 1%
C02 0.04%
Water vapour H20- depends on the weather

Question 2

Name a gas in the air that exists as single atoms

Answer 2

Argon

Question 3

Name a gas in the air that is an element that contains two atoms

Answer 3

Nitrogen / Oxygen

Question 4

Name a gas in the air that is a chemical compound

Answer 4

C02

Question 5

What does diatomic mean?

Answer 5

A molecule made of only two atoms

Question 6

Name a diatomic molecule in air

Answer 6

Oxygen (O2), Nitrogen (N2)

Question 7

Name a use of carbon dioxide

Answer 7

Dry ice - for special effects
Carbonated drinks - makes them fizzy
Fire extinguishers - Puts out fire

Question 8

Give a use of oxygen

Answer 8

Pure oxygen in hospitals to help breathing
Welding - makes very high temperatures to join metals together

Question 9

What is Argon used for?

Answer 9

In light bulbs as it is un-reactive it stops the filament from burning out

Question 10

One of the gases in air is used to make Ammonia for fertiliser. Which one is it?

Answer 10

Nitrogen