i can't give you a full answer to the lack of info, but everything goes somewhere. take the making of water, for instance. 2 Hydrogen and 1 Oxygen <u>must</u> equal H2O (2 parts hydrogen and 1 part oxygen) after being made.
Long story short: what goes in must have the same amount of atoms after the chemical reaction.
Explanation:
a) 4P + 3O2 --> 2P2O3
b) The chemical reaction above limits the number of molecules of P2O3 produced for every 4 atoms of P.
Answer:
So the answer is every day
Explanation:
Plants respire at all times of the day and night because their cells need a constant energy source to stay alive.