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Questions and Answers
What is air primarily composed of?
What is air primarily composed of?
- Nitrogen and oxygen (correct)
- Oxygen and helium
- Carbon dioxide and nitrogen
- Oxygen and carbon dioxide
Which gas is the most abundant in air?
Which gas is the most abundant in air?
- Oxygen
- Nitrogen (correct)
- Argon
- Carbon dioxide
What is the approximate percentage of oxygen in the air?
What is the approximate percentage of oxygen in the air?
- 78%
- 42%
- 1%
- 21% (correct)
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