Oxygen And Oxides

Question 1

Name three ways water can be purified

Answer 1

Distilation
Ion exchange
Special fliters

Question 2

What three gases are the majority of the gases in the air

Answer 2

Nitrogen
Oxygen
Argon

Question 3

What % of the air is nitrogen

Answer 3

78%

Question 4

What % of air is oxygen

Answer 4

21%

Question 5

What % of air is argon

Answer 5

0.9%

Question 6

How do you find the volume of oxygen in air

Answer 6

Finding the volume change in air when oxygen is reacted with another element

Question 7

What elements are reacted with oxygen to find the % of oxygen in air

Answer 7

Copper
Iron
Phosohorus

Question 8

How can oxygen be prepared in the lab

Answer 8

By catalytic decomposition of hydrogen peroxide

Question 9

How can carbon dioxide be manufactured in the lab

Answer 9

Reacting carbonates with acids

Thermal decomposition of metal carbonates

Question 10

What are the uses of carbon dioxide

Answer 10

Carbonating drinks

Fire extinguishers

Question 11

How is CO2 used to carbonate drinks

Answer 11

CO2 is dissolved under pressure in the drink