Question

how many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide

Answer 1

Answer : The number of moles of sulfur needed to oxidize will be, 3 moles

Solution : Given,

Moles of zinc = 3 moles

The balanced reaction will be,

$Zn^{2+}+S^{2-}\rightarrow ZnS$

By the stoichiometry, 1 mole of $Zn^{2+}$ ion react with the 1 mole of $S^{2-}$ to give 1 mole of zinc sulfide.

From the balanced reaction, we conclude that

As, 1 mole of zinc react with 1 mole of sulfur

So, 3 moles if zinc react with 3 moles of sulfur

Hence, the number of moles of sulfur needed to oxidize will be, 3 moles