Which chemical equation obeys the Law of Conservation of Mass? A.
Zn + HCl --> ZnCl + H2

B.
Zn + HCl --> ZnCl2 + H2

C.
Zn + 2HCl --> ZnCl2 + H2

D.
Zn + 2HCl --> 2ZnCl2 + H2

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.