help please! thanks in advance this is a chemistry question

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junior college 2 H3 Maths Singapore

help please! thanks in advance

this is a chemistry question

Date Posted: 3 years ago

B,C,D

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

Date Posted: 3 years ago

Germaine

3 years ago

very fast response & correct answer!

3 years ago

Thanks. Coincidentally when I opened the app, your question appeared at the same time.