1) The percentage of oxygen in dry air is _______ A. 0.1 B. 1.0 C. 21 D. 79 2) The composition of

Question

1) The percentage of oxygen in dry air is _______

A. 0.1
B. 1.0
C. 21
D. 79

2) The composition of the Earth’s earliest atmosphere was different to that of the present atmosphere. Which of these gases was present in large amounts in the Earth’s earliest atmosphere?

A. Oxygen
B. Carbon dioxide
C. Ammonia
D. Nitrogen

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Thu Giang 2 months 2021-07-12T03:23:43+00:00 2 Answers 2 views 0

Answers ( )

    0
    2021-07-12T03:24:46+00:00

    Answer: The percentage of oxygen in dry air is .  21

    Explanation:  Ammonia gases was present in large amounts  in the easth7s earliest atmosphere

    Hope it will help you

    0
    2021-07-12T03:25:20+00:00

    Answer:

    1) The percentage of oxygen in dry air is _______

    C. 21

    2) The composition of the Earth’s earliest atmosphere was different to that of the present atmosphere. Which of these gases was present in large amounts in the Earth’s earliest atmosphere?

    B. CARBON DIOXIDE

    Hope it helps

    have a nice day

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