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a
72 g
b
46 g
c
50 g
d
64 g
answer is D.
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Detailed Solution
The oxygen obtained from 72 kg of water is obtained by the following equation 2H2O2(2+16)=36⟶2H2(2×2)=4+O22×16=32Therefore, 36 kg of water produce 32 kg of oxygen .Hence, 72 kg of water produce oxygen = =32×7236=64kg.