please help it's chemistry, ans is B but I don't understand, please show working

Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.

secondary 4 | Biology
One Answer Below

Anyone can contribute an answer, even non-tutors.

Answer This Question

secondary 4 Biology

please help it's chemistry, ans is B but I don't understand, please show working. Very urgent, need by tonight, thank you!!

Date Posted: 6 years ago

done {{ upvoteCount }} Upvotes

clear {{ downvoteCount * -1 }} Downvotes

...

Date Posted: 6 years ago