Question

[1]carrct the sentence and write down( a)percentage of nitrogen in air is 21%​

Answer 1

Answer:

Nitrogen is the most abundant gas in the atmosphere. Air is composed of 78 percent nitrogen. Oxygen accounts for 21 percent, and the inert noble gas argon makes up 0.9 percent of the air. The remaining 0.1 percent consists of several trace gases. Most of the 0.1 percent is carbon dioxide. Other traces gases include neon, helium, methane (CH4), nitrous oxide (N2O) and ozone

Explanation:

Answer 2

Given :- correct the sentence and write down :-

(a) percentage of nitrogen in air is 21% .

Answer :- percentage of nitrogen in air is 78% .

Explanation :-

• The most abundant naturally occurring gas in the air is Nitrogen which is equal to approximately 78% of the total air .
• Second abundant naturally occurring gas in the air is Oxygen which is equal to approximately 21% of the total air .
• Third one is argon which is equal to 0.9% of the total air .

therefore, the correct sentence is "percentage of nitrogen in air is 78% ."

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