Your just answering the questions..? lol
I’m not really good at balancing chemical equations but I suggest you search Balance Chemical Equation - Online Balancer. This website will help you balance the equations you have. Hope this helps a little
The answer is a. H+ and H2O. For a half-reaction in acidic solutions, elements that are not hydrogen and oxygen are balanced first. Then we add H2O to balance oxygen atoms and we add H+ to balance the hydrogen atoms. We do the same steps for basic solutions, but we also add hydroxide ions OH- in the latter part.
A. by lowering the activation energy
Atomic size gradually decreases from left to right across a period of elements.
