The answer is A, because of the chemical reaction taking place color can change (as in this case). Hope it helps!
The concentration of a substance is the quantity of solute present in a given quantity of solution.
Answer:
A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute.
Answer: Avogadro's Law
Explanation: It states that the volume of the gas is directly proportional to the number of moles of the gas at constant pressure and temperature of the gas.
