Answer:
A
Explanation:
They will collect samples from different sites and write their observations
Similarities. very useful
differences. coal is a pullutant. while womd is not. i guess
The answer to your question is the first one!
there are 2 copper atoms on the left side of the arrow, but none on the other side. there are also 7 oxygen atoms on the left hand side, but only 5 on the right hand side of the arrow.