If 558 kg of powdered iron react with powdered sulfur to produce 879 kg of iron sulfide, what is the mass of reacting sulfur?

1 Answer
anor277
Jan 29, 2017

Well, is not mass conserved in a chemical reaction?

Explanation:

Of course, mass is conserved in every chemical reaction. If there are #879*kg# of #"iron sulfide"#, and #558*kg# of #"iron"#, then #321*kg# sulfur must have reacted.

Further, we can calculate the empirical formula of the #"iron sulfide....."#

#"Moles of iron"# #=# #(558*kg)/(0.0558*kg*mol^-1)=10000*mol.#

#"Moles of sulfur"# #=# #(321*kg)/(0.03206*kg*mol^-1)=10000*mol.#

Given #1:1# molar equivalence, we have #FeS#.

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