Answer:
False
Explanation:
It is psychological for you do not depend on it to live.
Answer: B
At equilibrium, the rate of the forward reaction is equal to the rate of the reverse reaction, and thus the concentrations of the reactants and products must be constant.
actually its D) movement of tectonic plates
N(Ca)=3×N(Ca₃(PO₄)₂)=
=3×2.3×10²³=6.9×10²³
6.02×10²³→40g
6.9×10²³→Xg
m(Ca)=X≈45.85g
