Question

Which chemical equation shows that mass is conserved during a chemical reaction?

a) 3 Al + 3 FeO → Al2O3 + 3 Fe
b) 2 Al + 3 FeO → ALLO3 + 3 Fe
c) 2 Al + 6 FeO → Al2O3 + 3 Fe
d) 2 Al + 3 FeO → AlO3 + 4 Fe

Answer 1

The chemical equation that shows that mass is conserved during a chemical reaction is 3 Al + 3 FeO → Al2O3 + 3 Fe.

Step-by-step explanation:

The chemical equation that shows that mass is conserved during a chemical reaction is a) 3 Al + 3 FeO → Al2O3 + 3 Fe.

This equation indicates that for every 3 moles of aluminum (Al) and 3 moles of iron(II) oxide (FeO) that react, 1 mole of aluminum oxide (Al

2

O

3

) and 3 moles of iron (Fe) are produced. The coefficients in the balanced equation demonstrate that the number of atoms of each element is conserved on both the reactant and product sides.