Which feature of a balanced chemical equation demonstrates the law of conservation of mass?
A. It has the same types of atoms on both sides of the reaction
arrow.
B. It shows the reactants of a chemical reaction to the left of the
reaction arrow.
C. It shows the products of a chemical reaction to the right of the
reaction arrow
D. It has coefficients to show how much of each substance a
chemical reaction uses.
SUBMIT

I think D? I'm not too sure on this one, but that would be my guess.

Explanation:

Another answer is : It has equal numbers of each type of atom in its reactants and products.

Explanation:

I just got it right on A.pex

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.