Which statement best describes the equation CaCO3 + 2HCl → CaCl2 + CO2 + H2O?
A
CaCO3 is a reactant; it is present before the reaction occurs.B
CaCl2 is a reactant; it is present before the reaction occurs.C
CO2 is a reactant because it is most likely a gas.D
H2O is a reactant because it is most likely a liquid.