Download The Mole Practice Quiz and Answers

Name__________________________________
Period_______
PT #_____
Clicker #_____
The Mole Practice Quiz
True/False. If False Change the underlined portion so the answer is true
1. _____ Avogadro’s number refers to the number of particles in one gram of a substance.
2. _____ An element’s molar mass is equivalent to the atomic number of the element.
3. _____ In order to convert the number of particles of a substance to the substance’s mass, it is
necessary first to convert the number of particles to the number of moles.
Answer the following:

Show your work

Correct significant figures
and units on numbers
4. Calculate the number of atoms in 13.2 mol copper.
5. Calculate the number of molecules in 4.0 mol H2O.
6. How many moles of Ag contain 4.49 x 1023 atoms Ag?
7. Which element has a molar mass of 30.97 g/mol?
a. Potassium
c. Gallium
b. Phosphorus
d. Palladium
8. What is the correct molar mass for the compound Iron III Sulfate?
9. Determine the mass in grams of 0.0489 mol cobalt.
10. How many grams of potassium permanganate are in 2.20 moles?

CIRCLE your answer.
11. What is the mass in grams of 1.02 x 1024 atoms manganese (Mn)?
12. Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure
copper coin weighing 12.0 g?
Use the following formula to answer questions 11-15.
64.32 g of Calcium Azide
13. What is the molar mass of the substance?
14. How many formula units are in the sample?
15. How many azide ions are in the sample?
16. How many nitrogen atoms are in the sample?
17. How many protons are in the sample?
Name__________________________________
Period_______
PT #_____
Clicker #_____
The Mole Practice Quiz Answers
True/False. If False Change the underlined portion so the answer is true
18. False
Avogadro’s number refers to the number of particles in one gram of a substance.
The molar mass
19. False
An element’s molar mass is equivalent to the atomic number of the element.
Atomic Mass
20. True
In order to convert the number of particles of a substance to the substance’s mass, it is
necessary first to convert the number of particles to the number of moles.
Answer the following:



Show your work
Correct significant figures and units on numbers
CIRCLE your answer.
21. Calculate the number of atoms in 13.2 mol copper.
7.95 x 1024 atoms Cu
22. Calculate the number of molecules in 4.0 mol H2O.
2.4 x 1024 molecules H2O
23. How many moles of Ag contain 4.49 x 1023 atoms Ag?
0.746 mol Ag
24. Which element has a molar mass of 30.97 g/mol?
a. Potassium
c. Gallium
b. Phosphorus
d. Palladium
25. Which is the correct molar mass for the compound Iron III Sulfate?
399.91 g/mol
26. Determine the mass in grams of 0.0489 mol cobalt.
2.88 g of Co
27. How many grams of potassium permanganate are in 2.20 moles?
348 g of KMnO4
28. What is the mass in grams of 1.02 x 1024 atoms manganese (Mn)?
93.1 g Mn
29. Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure
copper coin weighing 12.0 g?
1.14 x 1023 atoms Cu
Use the following formula to answer questions 11-15.
64.32 g of Calcium Azide
30. What is the molar mass of the substance?
Ca(N3)2 molar mass is 124.14 g/mol
31. How many formula units are in the sample?
3.12 x 1023 formula units of Ca(N3)2
32. How many azide ions would be in the sample?
6.24 x 1023 ions of N333. How many nitrogen atoms would be in the sample?
1.87 x 1024 atoms of N
34. How many protons in the sample?
1.93 x 1025 protons