You would pick amounts of water as your IV and do like 0 mL, 20 mL, 40 mL, and 60 mL as groups (for example, amount can be changed). Whichever had the best growth in the certain amount of time, with all other variables constant, would be it.
Answer:
The answer is A. Nickel, zinc, and iron
Explanation:
It has 4 electrons, because the number of protons and the number of electrons must be equal.
Its b) reactant and the chemical energy of the
