gases in the atmosphere

Question 1

what percentage of nitrogen is in the atmosphere

Answer 1

78%

Question 2

what percentage of oxygen is in the atmosphere

Answer 2

21%

Question 3

what percentage of argon is in the atmosphere

Answer 3

1%

Question 4

what percentage of carbon dioxide is in the atmosphere

Answer 4

0.04%

Question 5

how do you prove % of oxygen in atmosphere using phosphorus

Answer 5

• add phosphorus to an evaporating dish and place in a trough of water
• the phosphorus is ignited
• cover evaporating dish with a bell jar
• measure and record the starting height of the water
• leave the apparatus for a time and measure and note final height
• total before - total after /total volume before x100