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- 1. Multiple Choice
1Pb(NO3)2+ 2NaI→ 1PbI2 + 2NaNO3. If 0.2 mol of Pb(NO3)2 and 0.6 mol NaI add, which is limiting?NaIPb(NO3)2Pb(NO3)2 and NaINone of the above - 2. Multiple ChoiceUse the equation 2 Al + 3 Cl2 ---> 2 AlCl3. If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.AlCl3Cl2Al
- 3. Multiple ChoiceWhat is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2ONH3NON2water - 4. Multiple ChoiceWhen does a chemical reaction stop?When the lab is finishedWhen the excess reactant is used upWhen the limiting reactant is used upChemical reactions never stop
- 5. Multiple ChoiceA chemical reaction involving substances A and B stops when B is completely used. B is theexcess reactantprimary reactantlimiting reactantprimary product
- 6. Multiple Choice
Using the diagram, determine the limiting reactant, the product formed is water.
oxygen
hydrogen
none of the reactant are limiting
both hydrogen and oxygen
- 7. Multiple Choice
What is the limiting reactant if 15.0 moles of NH3 react with 16.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
NH3
NO
N2
water
- 8. Multiple Choice
How many moles of excess reactant are left over if 15.0 moles of NH3 react with 16.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2O
10.7 moles of NH3
10.7 moles of NO
4.33 moles of NH3
4.33 moles of NO
- 9. Multiple Choice
Consider the following reaction:
2Ca + 3CO2 --> 2CaCO3
How many moles of C3H8 need to combust in order to produce enough carbon dioxide to completely react with 4 moles of calcium?
(Hint: you have to first write the balanced chemical equation for the combustion of C3H5 and then work backwards by figuring out the number of CO2 needed to react with 4 moles of Ca using 2Ca + 3CO2 --> 2CaCO3)
6 moles of C3H8
2 moles of C3H8
4 moles of C3H8
10 moles of C3H8
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