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Earn +20 ptsQ: Oxygen is what percent of the hydrosphere?
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What percent is hydrogen is of the hydrosphere?
Hydrogen makes up about 11% of the Earth's hydrosphere.
What is the percent of oxygen in dry air?
The percent of oxygen in dry air is approximately 21%.
What is the mass percent of oxygen?
The mass percent of oxygen is approximately 21% in Earth's atmosphere.
When 99 percent of the atmosphere is made up of either oxygen or?
Nitrogen, with oxygen making up about 21 percent and nitrogen making up about 78 percent.
What makes up 21 percent of the air by volume?
Oxygen makes up 21 percent of the air by volume.
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