Pre-AP Exam Practice

1. Find the Molar Mass of the following compound:

• 136.3 g/mole
• 120.3 g/mole
• 140.5 g/mole
• 128.3 g/mole

2. Find the Molar Mass of the following compound:

• 189.9 g/mole
• 312.5 g/mole
• 241.9 g/mole
• 134.3 g/mole

3. Find the Molar Mass of the following compound:

• 213.5 g/mole
• 143.7 g/mole
• 278.3 g/mole
• 342.2 g/mole

4. Find the Molar Mass of the following compound:

• 140.8 g/mole
• 210.4 g/mole
• 314.7 g/mole
• 278.5 g/mole

5. Find the Molar Mass of the following compound:

• 123.6 g/mole
• 148.9 g/mole
• 138.8 g/mole
• 118.7 g/mole

1. Determine the number of moles in 74 grams KCl. Atomic Mass: K =39.10 Cl= 35.45

• 1.2 moles
• .99 moles
• 3.22 moles
• 2.9 moles

2. Determine the number of moles of the following:

• 3.6 moles
• 2.31 moles
• 4.00 moles
• 1.28 moles

3. Determine the number of grams of the following:

• 22 grams
• 49 grams
• 32 grams
• 58 grams

4. Determine the number of grams of the following:

• 112 grams
• 136 grams
• 146 grams
• 126 grams

1. Determine the Percent Composition of H in the following compound:

• 1.2 %
• 11.8 %
• 8.9 %
• 10.6 %