13. How many atoms of oxygen will be found in the product(s) of the reaction?

Question

Fe2O3 + 3H2SO4

3

12

4

15****

14. Use the table and equation to answer the question.

Element Atomic Mass (amu)
hydrogen 1
carbon 12
oxygen 16
CH4 + 2 O2 → CO2 + 2 H2O

The law of conservation of matter states that matter cannot be created nor destroyed. How does the balance equation above demonstrate this law?

The number of molecules, number of atoms, and mass of reactants and products are equal.

The number of molecules, number of atoms, and type of elements are equal.

The number of molecules, type of elements, and mass of reactants and products are equal. ****

The number of atoms, type of elements, and mass of reactants and prod

Answer 1

1.
Assuming the coefficients for Fe2O3 and 3H2SO4 do NOT change, then 15 is correct.
2.
The ATOMS on both sides are the same so I don't agree with your answer.
For example, in CaCO3 ==> CaO + CO2, you see the atoms on the left = atoms on th right but the number of molecules is not the same.