A mole of oxygen atoms (with the formula O) contains 6.02×1023 O atoms. A mole of oxygen molecules (formula O2) contains 6.02×1023 O2 molecules – that is, 2×6.02×1023 O atoms.
In this problem there are (2.3×106) /2 = 1.15×106 molecules of O2.
Proportion according to the reaction:
5 – 3
1.15 ×106 – x
x = 0.69 ×106 molecules of CO2
Answer: 6.9 ×105 molecules
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