What is the sum of the coefficients of the reactants for the balanced chemical equation #"2FeS"_2 + "5O"_2"##rarr##"Fe"_2"O"_2 + "4SO"_2"#?

1 Answer
Meave60
May 5, 2018

#7#

Explanation:

Balanced equation

#"2FeS"_2 + "5O"_2"##rarr##"Fe"_2"O"_2 + "4SO"_2"#

The reactants are on the left-hand side of a chemical equation. So #"FeS"_2# and #"O"_2"# are the reactants for this equation. So add the coefficients #2# and #5# to get #7#.

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