blk9hanapanta5 blk9hanapanta5

05-08-2016
Biology

contestada

What gas contributes to 78% of earth's modern atmosphere?
a. argon
b. nitrogen
c. oxygen
d. carbon dioxide

Respuesta :

Sora111 Sora111

05-08-2016

(b) Nitrogen while oxygen contributes to 21% and 1% is the other gases

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