Chemistrymedium · Past Paper
What mass of water is produced when 4g of Hydrogen reacts completely with 32g of Oxygen?
A32g
B36g
C40g
D28g
✓ Correct Answer: B — 36g
According to the Law of Conservation of Mass, the total mass of products (H2O) equals the total mass of reactants (4g H2 + 32g O2 = 36g).
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