Question

10.1g hydrogen and 14.3 g Fe3O4 are combined in a beaker. According to the chemical reaction, Fe3O4+4H2->3Fe+4H2O?
A) what is the limiting reagent
B) how many grams of each product are produced
C) how much of excess will be left over

Answer 1

A)
1st step: get each grams of H2 and Fe3O4and convert to moles
2nd step: get each moles of H2 and Fe3O4 and do mole to mole ratio to convert to moles of one of the product (either Fe or H2O).
3rd step: The least amount of moles of product is the limiting reactant, and therefore, the answer for A.

B)
Convert the limiting reactant of the product to grams

C)
1st step: Convert the limiting reactant moles to the excess reactant moles by mole to mole ratio.
2nd step: Convert excess reactant moles to grams.
3rd step: Subtract excess reactant grams from the grams the excess reactant started with.