HERE IS THE EXPLANATION OF THE QUESTION
#5. Which law states that when two or more elements react to produce a compound, the total mass of the compound is the same as the sum of masses of the individual elements?
a. Law of definite composition - a compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound. (For example sucrose, table sugar, contains the same proportions of elements whether you have 1 milligram or 1 kilogram)
b. Law of multiple proportions - the same elements may combine to form more than one compound. The ratios of atoms are in small whole numbers. (For example H2O & H2O2)
c. Law of atomic theory - This includes 5 basic principles dealing with the structure of the atom.
d. Law of conservation of mass - The total mass of a system remains the same whether elements are combined, separated, or rearranged.
*Combination: S
(32 mass units) + O2 (32 mass units) ----> SO2 (64 massunits)*Separation: 2HgO
(434 mass units) -----> Hg Hg (402 mass units) + O2 (32 mass units)*Rearrangement: H2CO3
(62 mass units) ----> H2O (18 mass units) + CO2 (44 mass units)
RIGHT ON THE MONEY!!!!!