KOR ZHI HENG's answer to Hui Ling's Secondary 4 Biology question.
Thank you very much for your help!!
for a) it's oxygen cuz they say form oxide.
b) 21/10 cuz air contains 21% O2
c) other gas elements found in air since 02 has been reacted (assume fully reacted in this reaction)
b) 21/10 cuz air contains 21% O2
c) other gas elements found in air since 02 has been reacted (assume fully reacted in this reaction)
Argon or CO2 might be a better answer to part c cuz they are more abundant in air
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