20 points geniuses.

How does the law of conservation of mass apply to this reaction:

Al + 3HCl --> H2 + AlCl3?

AThe equation needs to be balanced. There are fewer Hydrogen atoms in the equation than Aluminum or Chlorine.

BThe law of conservation of mass has already been applied. There is an equal number of each element on both sides of the equation.

CHydrogen and Chlorine need to be balanced. There is an equal amount of aluminum on each side.

DOnly the Hydrogen needs to be balanced. There are equal numbers of Aluminum and Chlorine.