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What is the composition of the atmosphere on Mars?

Updated: 8/16/2019
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6y ago

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95.32% carbon dioxide

2.7% nitrogen

1.6% argon

0.13% oxygen

0.08% carbon monoxide

210 ppm water vapor

100 ppm nitric oxide

2.5 ppm Neon

850 ppb HDO

300 ppb Krypton

130 ppb formaldehyde

80 ppb xenon

30 ppb ozone

10 ppb methane

Note: ppm stands for parts per million while ppb stands for parts per billion. 210 ppm of water vapour means water vapour makes up 210/1,000,000 of the atmosphere.

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Q: What is the composition of the atmosphere on Mars?
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