Law of Conservation of Mass

Front

Mass before = Mass after

Back

Evidence of equal atoms in reaction

Front

Substances used in chemical reactions

Back

Reactants

Front

New substances created in chemical reactions

Back

Products

Front

Atoms after a chemical change

Back

Bond in different ways / get rearranged

Front

Oxygen atoms in 2SO2 + 2H2O2 -> 2H2SO4

Back

8

Front

Hydrogen atoms in 2H2SO4

Back

4

Front

Atoms of N in 3N₂O₅

Back

6

Front

Law of Conservation of Mass

Back

Mass is never created or destroyed

Front

A + B -> C: A = 5g, C = 9g

Back

B = 4g

Front

Number in front of a compound

Back

Coefficient