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11 July, 12:36

How many Oxygen (O) atoms are in the following? H2O + CO2

3

2

4

+2
Answers (1)
  1. 11 July, 13:04
    0
    Identify each of the elements. H - Hydrogen, O-Oxygen, C - Carbon. The little number after the letter is the number of that element. H2O - 1 O and CO2 - 2 O
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