If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
theoretical yield
mole ratio
actual yield
percentage yield
2. Multiple Choice
2 minutes
1 pt
If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the
theoretical yield
mole ratio
actual yield
percentage yield
3. Multiple Choice
2 minutes
1 pt
What is the measured amount of a product obtained from a chemical reaction?
mole ratio
theoretical yield
percentage yield
actual yield
4. Multiple Choice
2 minutes
1 pt
What is the measured amount of a product obtained from a chemical reaction?
mole ratio
theoretical yield
percentage yield
actual yield
5. Multiple Choice
1.5 minutes
1 pt
Mole ratios are obtained from the
balanced chemical equation
periodic table
molar mass
6. Multiple Choice
2 minutes
1 pt
What is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO4
6:4
4:6
1:3
3:1
7. Multiple Choice
1.5 minutes
1 pt
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2 How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
0.85 g
290 g
450 g
870 g
8. Multiple Choice
30 seconds
1 pt
When does a chemical reaction stop?
When the lab is finished
When the excess reactant is used up
When the limiting reactant is used up
Chemical reactions never stop
9. Multiple Choice
3 minutes
1 pt
How many grams are in 7.8 moles of NaCl?
476grams
460 grams
452 grams
462 grams
10. Multiple Choice
1.5 minutes
1 pt
Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)
1,2,2,2
1,2,1,1
2,1,1,1
2,1,2,1
11. Multiple Choice
5 minutes
1 pt
Identify 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
Mg
H2
MgCl2
HCl
12. Multiple Choice
30 seconds
1 pt
2 CO (g) + O2(g) → 2 CO2 (g) In the formation of CO2 from CO and oxygen, how many Liters of CO2 are produced by the reaction of 8 mols of O2 with an excess of carbon monoxide?
0.178 L
358.4 Liters
704 grams
0.36 grams
13. Multiple Choice
30 seconds
1 pt
What is the molar mass of C6H12O6?
180.18
180.12
180.24
180.06
14. Multiple Choice
30 seconds
1 pt
N2 + 3H2 → 2NH3 How many moles of hydrogen are needed to react with 2 moles of nitrogen?
6
2
3
1
15. Multiple Choice
1.5 minutes
1 pt
2H2 + O2 → 2H2O How many moles of water can be produced if 8 moles H2 are used?