Answer to Question #320702 in General Chemistry for Lis

Question

In an experiment 1.90g of NH3 reacts with 4.96 of O2

4NH3(g) +5O2(g)=4NO(g)+6H2O(g)

Which is a limiting reactant

Answer 1

Number of moles of NH3= 1.9/17 = 0.11 moles

Stoichiometric mole = number of moles/ mole in the equation = 0.11/4 = 0.0275

Number of moles of oxygen= 4.96/32 = 0.0155

Stoichiometric mole = 0.155/5 = 0.031

The smaller number is 0.0275, thus NH3 is the limiting reagent