HESI A2 test chemistry - Stoichiometry

What is the mole ratio of hydrogen to oxygen in the reaction 2H2+O2→2H2O?

2:1

Given the reaction N2+3H2→2NH3​, what is the mole ratio of nitrogen to ammonia?

1:2

In the reaction 4Fe+3O2→2Fe2O3, what is the mole ratio of iron to iron(III) oxide?

2:1

How many moles of O2​ are needed to react with 2 moles of  C2H6 in the reaction 2C2H6+7O2→4CO2+6H2O?

7 moles

If you start with 3 moles of H2, how many moles of NH3 can be produced in the reaction N2+3H2→2NH3?

2 moles

Given the reaction 2KClO3→2KCl+3O2, what is the mole ratio of potassium chlorate to oxygen?

2:3

How many moles of CO2 are produced when 1 mole of C3H8 is burned in excess oxygen according to the reaction C3H8+5O2→3CO2+4H2O?

3 moles

For the reaction 2Al+3Cl2→2AlCl3​, how many moles of aluminum chloride are produced from 4 moles of aluminum?

4 moles

What is the mole ratio of sodium to chlorine in the reaction 2Na+Cl2→2NaCl ?

2:1

In the reaction 3H2+N2→2NH3​, how many moles of H2 are needed to produce 6 moles of NH3?

9 moles

How many moles of H2O are produced when 2 moles of H2​ react in excess oxygen according to the reaction 2H2+O2→2H2O?

2 moles

What is the mole ratio of CO2 to H2O in the combustion of methane CH4+2O2→CO2+2H2O?

1:2

Given the reaction 2SO2+O2→2SO3, how many moles of SO3 are produced from 5 moles of O2?

10 moles

How many moles of oxygen are needed to react with 0.5 moles of C3H8​ in the reaction C3H8+5O2→3CO2+4H2O?

2.5 moles

For the reaction 2H2O2→2H2O+O2​, how many moles of H2O2​ are needed to produce 1 mole of O2​?

2 moles

What is the mole ratio of aluminum to chlorine in the reaction 2Al+3Cl2→2AlCl3?

2:3

How many moles of NH3 can be produced from 1.5 moles of N2​ in the reaction N2+3H2→2NH3?

3 moles

In the reaction 4NH3+3O2→2N2+6H2O, what is the mole ratio of ammonia to nitrogen gas?

2:1

If you start with 2 moles of Cl2​, how many moles of NaCl can be produced in the reaction 2Na+Cl2→2NaCl?

4 moles

Given the reaction 4FeS2+11O2→2Fe2O3+8SO2​, what is the mole ratio of FeS2​ to SO2​?

1:2