Mole Review

How many moles of sodium chloride are in a 321.8 g sample?

• 18810 moles

• 3.315 x 10²⁴ moles

• 5.507 moles

• 4.767 moles

What is the mass of 2.50 mol of oxygen gas O₂?

• 40.0 g
• 80.0 g
• 16.0 g
• 32.0 g

how many atoms are contained in a 456 g sample of carbon dioxide?

• 10.34 atoms

• 6.237 x 10²⁴ atoms

• 1.871 x 10²⁵atoms

• 2.079 x 10²⁴ atoms

How many atoms would be contained in 454 grams of iron (Fe)?

• 6.02x10²³ atoms
• 8.14 atoms
• 4.90x10²⁴ atoms
• 55.85x10²³ atoms

5.11 x 10²³ atoms of lithium (Li) is equal to how many moles?

• 1.18 moles

• 0.351 moles

• 1.34 moles

• 0.849 moles

0.75 mole of copper (Cu) is equal to how many atoms?

• 8.03 x 10²³ atoms

• 6.02 x 10²³ atoms

• 4.51 x 10²³ atoms

• 3.11 x 10²³ atoms

0.50 moles of carbon (C) is equal to how many grams?

• 6.0 grams

• 12.0 grams

• 8.0 grams

• 14.0 grams

36.0 g of beryllium (Be) contains how many moles?

• 0.25 mol

• 4.0 mol

• 45 mol

• 320 mol

Find the mass in grams of 2.25 x 10²⁴ atoms of calcium (Ca).

• 40.0 grams

• 255.1 grams

• 150 grams

• 9.02 x 10²⁴ grams

What is the molar mass of AuCl₃?

• 96.00 g/mol

• 130.00 g/mol

• 232.51 g/mol

• 303.32 g/mol