Which of the following equations demonstrates the Law of Conservation of Mass? (1 point)

Question

Responses

CH4+O2→CO2+H2O
cap c cap h sub 4 plus cap o sub 2 right arrow cap c cap o sub 2 plus cap h sub 2 cap o

CH+O2→CO2+H2O
cap c cap h plus cap o sub 2 right arrow cap c cap o sub 2 plus 2 cap h sub 2 cap o

CH4+O2→CO2+HO
cap c cap h sub 4 plus cap o sub 2 right arrow cap c cap o sub 2 plus cap h cap o

CH4+O2→C+2H2O

Answer 1

The equation that demonstrates the Law of Conservation of Mass is:

CH4 + O2 → CO2 + H2O

This equation shows that the number of atoms of each element on the reactant side (left) is equal to the number of atoms of those same elements on the product side (right). Specifically:

• Carbon: 1 atom on both sides
• Hydrogen: 4 atoms on both sides (2 in H2O, but there are two water molecules)
• Oxygen: 2 atoms on the reactant side and 2 atoms on the product side (1 in CO2 and 1 in H2O)

The other equations have discrepancies in the number of atoms and therefore do not uphold the Law of Conservation of Mass.