sadirahmack26 sadirahmack26

16-12-2020
Geography

contestada

Earth's first atmosphere was composed of mainly which of the following gases?
O hydrogen and helium
O carbon dioxide and oxygen
O nitrogen and oxygen
O carbon monoxide and ozone

Respuesta :

Аноним Аноним

16-12-2020

Answer:

A

Explanation:

Hopefully this helps

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