Chem B Final Exam Review

How many particles are found in a mole?

What are the units used for Molar Mass

• grams

• mols

• g/mol

• mol/g

How many grams are in 3 mol of carbon?

• 6 grams

• 12 grams

• 18 grams

• 36 grams

What is the correct equation to calculate the number of moles in 3.13 x 10²⁶ molecules of H₂O₂?

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How many molecules of sugar (C₆H₁₂O₆) are in a mole?

• 24 molecules
• 180 molecules
• 180 g
• 6.02 x 10²³ molecules

Convert 4.5x10²⁴ atoms to moles

• 0.747 particles

• 0.747 mol

• 2.71x10⁴⁷ mol

• 2.71x10⁴⁷ particles

A sample of AlCl₃ contains a total of 4.515 x 10²⁷ atoms. What must be the mass of this sample?

• 2.500 x 10⁵ g

• 1.000 x 10^-6 g

• 18.75 g

• 1.01 x 10⁶ g

Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?

• A
• B
• C
• D

How many atoms of carbon are in 6.00 g of carbon?

• 1.20x10²⁴ atoms C

• 6.02x10²³ atoms C

• 3.01x10²³ atoms C

• 1.50x10²³ atoms C

Find the percent composition of CaCl₂?

• Ca: 36.11%; Cl: 63.88%

• Ca: 53.12%; Cl: 100%

• Ca: 36.11%; Cl: 83.56%

• Ca: 46.11%; Cl: 63.88%