Question

Which equation obeys the law of conservation of mass?

Answer 1

4Fe + 3O2 → 2Fe2O3, hope this helps man!

Answer 2

Step-by-step explanation:

According to law of conservation of mass, total mass of reactants will be equal to the total mass of products.

For example,
`HCl + NaOH \rightarrow NaCl + H_(2)O`

Therefore, mass of reactant molecules will be as follows.

Mass of HCl is 36.46v g/mol

Mass of NaOH is 39.99 g/mol

Total mass of reactants is (36.46 + 39.99) g/mol = 76.45 g/mol

Mass of product molecules will be as follows.

Mass of NaCl is 58.44 g/mol

Mass of
`H_(2)O` is 18.01 g/mol

Total mass of products is (58.44 + 18.01) g/mol = 76.45 g/mol

Thus, we can conclude that any equation which represents total mass of reactants equal to the total mass of products is actually obeying the law of conservation of mass.