Question

write them down 1) correct the sentences and a) The percentage of Nitrogen. in air is 21%.​

Answer 1

Explanation:

Nitrogen is a colourless, odorless, tasteless and inert gas that accounts for 78 percent of the Earth's atmosphere. So, 78% of Nitrogen is present in the atmosphere. Therefore, the correct option is (d).

Answer 2

Explanation:

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of lots of other gases, too, such as carbon dioxide, neon, and hydrogen.

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