Question

A reaction produces 74.10 g Ca(OH)2 after 56.08 g CaO is added to 36.04 g H2O. How should the difference in the masses of reactants and products be explained?

CaO + H2O Ca(OH)2

A. The reaction that occurred was a nuclear change in which some matter was converted into energy.
B. Some water was in excess and makes up the difference in mass.
C. A side reaction produced gaseous CO2 that escaped from the system.

Answer 1

@JFraser It's B right?

Answer 2

it's the only option that makes sense, since there are no carbon atoms to make \(CO_2\) and nuclear reactions don't convert that much mass into energy at one time

Answer 3

Thanks!