1. The diagram shows the gases in dry air - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Question 1
1. The diagram shows the gases in dry air.
(i) Complete the sentence by putting a cross (X) in the box next to your answer.
The percentage of nitrogen in dry air is... show full transcript
Worked Solution & Example Answer:1. The diagram shows the gases in dry air - Edexcel - GCSE Chemistry - Question 1 - 2013 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer. The percentage of nitrogen in dry air is
96%
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Answer
The correct answer is C 78%. Nitrogen makes up approximately 78% of the Earth's atmosphere.
Step 2
Give the name of the gas in air that is produced by photosynthesis.
99%
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