How does the law of conservation of mass apply to this reaction: C₂H₂ + O2 → H₂O + CO₂?
Only the oxygen needs to be balanced. There are equal numbers of hydrogen and carbon
OEach element needs to be balanced.
The law of conservation of mass has already been applied. There is an equal number of each
the equation.
The equation needs to be balanced. There are fewer oxygen atoms in the equation than hydro