The Mole and Reaction Stoichiometry Study Guide Part 1
Name:___________________________ Date:________________ Class Period:____
Part I. Converting between Mass (g) and Moles: Convert the following. Show all work.
1. Determine the mass in grams for:
a. 3.57 mol Al
b. 5.78 mol Cu2SO4
2. Determine the amount of moles in the following masses:
a. 300 g S
b. 14 kg Fe(NO3)2
3. Determine the number of atoms in 3.02 moles of Tin:
4. Determine the amount of moles in 2.99 x 1023 atoms of zinc:
5. What is the formula for the compound Aluminum nitrate? __________________
a. What is the molar mass for Aluminum nitrate?__________________
b. Determine the percentage of Nitrogen in Aluminum Nitrate.
c. How many moles are equal to 43.8 g aluminum nitrate?
d. How many formula units are in 125 g of aluminum nitrate?
e. How many moles are in 2.50 x 1019 formula units of aluminum nitrate?
6. Arrange the following in order of mass from the smallest mass to the largest mass:
1.0 mol Ar
3.0 x 1024 atoms of Ne
20 g of Kr
7. How many molecules are in 52 g of CO2?
8. What is the percent composition of each element in phosphoric acid (H3PO4)?
9. Determine the empirical formula for a compound consisting of 77.3% silver,
7.4 % phosphorus, and 15.3 % oxygen.
10. Write a balanced reaction for the following and identify the type of reaction:
silver nitrate + nickel  nickel(II) nitrate + silver
11. Write a balanced reaction for the following and identify the type of reaction:
nickel(II) chlorate nickel (II) chloride + oxygen
12. Which has more atoms, 10 g of carbon or 10 g of calcium?
Which has more atoms 10 mol C
or
10 mol Ca
Answer Key:
1. a. 96.3 g Al
b. 1 mol Cu2SO4 = 223.2 g 1,290.1 g Cu2SO4
2. a. 9.355 mol S
b. 179.85 g = 1 mol Fe(NO3)2
76.84 mol Fe(NO3)2
24
3. 1.82 x 10 atoms Sn
4. 0.5 mol Zn
5. a. Al(NO3)3 b. 165 g/mol c. 0.265 mol Al(NO3)3 d. 4.56 x 1023 atoms Al(NO3)3
e. 4.15 x 10-5 mol Al(NO3)3
6. 20 g Kr, 1.0 mol Ar, 3.0 x 1024 atoms Ne
7. 7.11 x 1023 molecules CO2
8. 3.1 % H
31.6 % P
65.31 % O
9. Ag3PO4
10. 2AgNO3 + Ni → Ni(NO3)2 + 2Ag
single replacement
11. Ni(ClO3)2 → NiCl2 + 3O2
decomposition
23
23
12. 5.01 x 10 atoms C
1.5 x 10 atoms Ca More atoms in 10 g C
13. 10 moles of each contain the same number of atoms for each element