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- 1. Multiple ChoiceThe limiting reactant.is used up firstis the reactant that is left over.
- 2. Multiple ChoiceThe excess reactant.is used up firstis the reactant that is left over.
- 3. Multiple Choice1 Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies?23346846 - 4. Multiple Choice1 Body + 4 Tires --> 1 car
How many cars can you make with 92 tires and 34 bodies?
In this senario the tires would be the _____________ reactant.LimitingExcess - 5. Multiple ChoiceWhen the limiting reactant is used up, what happens?the reaction speeds upthe reaction slows downthe reaction moves to its 2nd stagethe reaction stops
- 6. Multiple ChoiceWhat are the correct steps for determining the limiting reactant?divide each reactant by its molar mass and look for the smallest numberbalance the chemical equation and look for the smallest coefficientdivide the moles of each reactant by its coefficient and look for the smallest numberdivide each reactant by Avogadro's number and look for the smallest number
- 7. Multiple ChoiceWhat is the measured amount of a product obtained from a chemical reaction?mole ratiotheoretical yieldpercentage yieldactual yield
- 8. Multiple ChoiceTrue or False?
A chemical reaction stops before the limiting reagent is used up.TrueFalse - 9. Multiple ChoiceWhen does a reaction stop?When it wants toWhen both the limiting and excess reactants are goneWhen all the excess reactant has been consumedWhen all the limiting reactant has been consumed
- 10. Multiple ChoiceWhat is the limiting reactant if 10 moles of NH3 react with 30.0 moles of NO?
4NH3+6NO --> 5N2 + 6H2ONH3NON2water - 11. Multiple ChoiceWhat is the limiting reactant if 15 moles of NH3 react with 16 moles of NO?
4NH3+6NO --> 5N2 + 6H2ONH3NON2water - 12. Multiple Choice*Look back at preceding question. * What is the limiting reactant if 15 GRAMS of NH3 react with 16 GRAMS of NO?
4NH3+6NO --> 5N2 + 6H2O
(Remember, convert grams to moles, then divide each substance by the number of moles given as the coefficient from the balanced chemical equation).NH3 is the limiting because the reaction only requires 0.22 mol of NH3NO is the limiting reactant because the reaction only requires 0.088 mol NONH3 is the limiting because the reaction only requires 0.88 mol of NH3NO is the limiting reactant because the reaction only requires 0.53 mol NO - 13. Multiple Choice
The Formula to make S'mores is:
2C + 1M + G2 → C2MG2. If you have 5 Marshmallows (M), 9 Chocolate Pieces (C), and 9 Graham Cracker Halves (G), how many S'mores can you make?54842 - 14. Multiple ChoiceTrue or False?
The actual yield is usually greater than the theoretical yield.FalseTrue - 15. Multiple ChoiceMole ratios are obtained from thebalanced chemical equationperiodic tablemolar mass
- 16. Multiple ChoiceWhat is stoichiometry?The study of how the quantities of reactants and products are related in chemical reactionsThe study of the speed of reactionsThe study of how chemical reactions occurThe study of types of reactions
- 17. Multiple ChoiceStoichiometry is based on the law of conservation ofchargemassreactantsvolume
- 18. Multiple ChoiceIn a balanced equation, the ratio between the coeffients of any two substances is called the _______.mole ratiostoichiometrylimiting reactantexcess reactant
- 19. Multiple ChoiceThe study of quantitative relationships between the amounts of reactants used and products formed by a chemical reaction; is based on the law of conservation of masspercent yieldstoichiometrymole ratiolimiting reactant
- 20. Multiple ChoiceA reactant that remains after a chemical reaction stopsstoichiometrymole ratioexcess reactantlimiting reactant
- 21. Multiple ChoiceA reactant that is totally consumed during a chemical reaction, limits the extent of the reaction, and determines the amount of productstoichiometrymole ratioexcess reactantlimiting reactant
- 22. Multiple ChoiceTo determine the limiting reactant in a chemical reaction, one must know theamount of product formedavailable amount of one of the reactantsavailable amount of each of each reactantspeed of the reaction
- 23. Multiple ChoiceThe coefficients in a chemical equation represent thenumber of atoms in each compound in a reactionrelative numbers of moles of reactants and productsmasses, in grams, of all reactants and productsnumber of valence electrons involved in the reaction
- 24. Multiple ChoiceA chemical reaction involving substances A and B stops when B is completely used. B is theexcess reactantprimary reactantlimiting reactantprimary product
- 25. Multiple ChoiceStoichiometry is based on _____________.the law of constant ratiosAvogadro's constantlaw of conservation of masspercent composition
- 26. Multiple ChoiceMole ratios are obtained from the ________________.balanced chemical equationmolar massesperiodic tablesubscripts
- 27. Multiple ChoiceWhat is the first thing you must do to solve a stoichiometric problem?find the excess reactantfind the limiting reactantfind the empirical formulawrite a balanced chemical equation
- 28. Multiple ChoiceHow do you determine the limiting reactant?Find the amount of product produced by each amount of reactant. The reactant that makes the most is the limiting reactant.Find the amount of product produced by each amount of reactant. The reactant that makes the least is the limiting reactant.The reactant with the least amount of mass (grams) present is the limiting reactant.Cannot be determined.
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