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A 20-volume H2O2 solution is fully decomposed. How much O2 does 5 mL give?
A200 mL
B100 mL
C50 mL
D20 mL
Answer & Solution
Correct answer: B. 100 mL
1 mL of 20-volume solution gives 20 mL of oxygen, so 5 mL gives 5 times 20 = 100 mL.
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