Please help with these 3 questions...thank you so much! They are about Physical Science and balanced reactions, thanks again!

Please help with these 3 questionsthank you so much They are about Physical Science and balanced reactions thanks again class=
Please help with these 3 questionsthank you so much They are about Physical Science and balanced reactions thanks again class=
Please help with these 3 questionsthank you so much They are about Physical Science and balanced reactions thanks again class=