Eric Nicholas K's answer to Annela's Secondary 4 Chemistry Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
3641 answers (Tutor Details)
Good evening Annela! Here are my workings for Q7.

The graph ends at the same height but graph II ends earlier than graph I, indicating that the number of moles of O2 gas produced is the same, thereby telling us that the number of moles of H2O2 decomposed must be the same in both cases but the concentration used in II is higher than in I.

D is the best option for Q7.

Wait for Q8.