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- 1. Multiple ChoiceIf a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating thetheoretical yieldmole ratioactual yieldpercentage yield
- 2. Multiple ChoiceWhat is the measured amount of a product obtained from a chemical reaction?mole ratiotheoretical yieldpercentage yieldactual yield
- 3. Multiple ChoiceMole ratios are obtained from thebalanced chemical equationperiodic tablemolar mass
- 4. Multiple ChoiceWhat is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO46:44:61:33:1
- 5. Multiple Choice2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?0.85 g290 g450 g870 g - 6. Multiple ChoiceFor the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?749 g225 g479 g814 g
- 7. 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
- 8. Multiple ChoiceIdentify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl2.
Mg + 2HCl --> MgCl2 + H2
MgH2MgCl2HCl - 9. Multiple ChoiceHow many grams are in 7.8 moles of NaCl?476grams460 grams452 grams462 grams
- 10. Multiple ChoiceBalance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)1,2,2,21,2,1,12,1,1,12,1,2,1 - 11. Multiple ChoiceUsing the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?4 moles Fe6 moles Fe9 moles Fe2 moles Fe - 12. Multiple ChoiceIdentify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl2.
1 Mg + 2 HCl --> 1 MgCl2 + 1 H2
MgH2MgCl2HCl - 13. Multiple Choice
9. Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%actual yield; theoretical yieldtheoretical yield; actual yield - 14. Multiple Choice11.
LiOH + KCl → LiCl + KOH
b) I actually produced 6 grams of lithium chloride and I began this reaction with 20 grams of lithium hydroxide. What is my percent yield?16.9%5.91%1.88%12.3% - 15. Multiple ChoiceFe (s) + S (l) --> FeS (s)
In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?14.8 g12.2 g13.7 g19.9 g - Answer choicesTagsAnswer choicesTags