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Choose all of the chemical reactions which correctly show that chemical reactions must obey the Law of Conservation of Matter.

a. CH4 + 2O2 → CO2 + H2O
b. H2 + O2 → H2O ***
c. C6H12O6 + 6O2 → 6CO2 + 6H2O
d. 2CO + O2 → 2CO2 ***
e. 4P + O2 P4O10

1 answer

(b) what happened to the other O?
(c) ?
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