Question

What are the coefficients when the chemical equation below is balanced?

___ FeS + ____ O2 = ___ Fe2O3 + ___ SO2
Select one:
a)1, 1, 1, 1
b)4, 6, 1, 2
c)4, 7, 2, 4
d)2, 3, 1, 2

Answer 1

Answer: c)4, 7, 2, 4

Step-by-step explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

The balanced chemical equation will be :

`4FeS+7O_2\rightarrow 2Fe_2O_3+4SO_2`

The coefficients when the chemical equation below is balanced are 4, 7, 2, 4