Cheyenne7327
04.02.2021 •
Chemistry
ASAPPP HELPPP
Oxygen in Earth's early atmosphere was first produced during the Precambrian from
A)
cyanobacteria in Earth's oceans
B)
volcanic activity along plate boundaries
C)
the absorption of sunlight by plants
D)
evaporation of ocean water
Solved
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Ответ:
HCl = 36.5 /mal. 1. 2.5 moles of hydrochloric acid would have a mass of ... 1.204 x 1024 molecules of carbon monoxide would contain 2.000 moles. ... 489 x mol. 602 103 molecules. 5. 48 grams of oxygen would contain ... 1.806x1024 mlcx mol
Explanation: