7.2 Mole Conversion Practice

How many molecules are in 2.5 mol of NaCl?

• 1.51x10²³
• 146
• 4.15
• 1.51x10²⁴

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

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

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

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5 moles

What is the mass of 0.89 mol of CaCl₂?

• 111 grams
• 0.008 grams
• 98.9 grams
• none of the choices

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆? 

• 1 mole = 78.12 g
• 1 mole = 22.4 L 
• 1 mol = 6.02x 10²³ particles 
• more than one

Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"

• 1 mol = 22.4 L 
• 1 mol = 39.95 g
• 1 mol = 6.02x10²³ atoms
• More than 1

How many moles are in 22 g of argon? 

• 880 moles
• 0.55 moles
• 1.81 moles
• 5 moles

The total number of sodium atoms in 46.0 grams is

• 3.01 x 10²³
• 6.02 x 10²³
• 12 x 10²³
• 24 x 10²³

Which sample of O₂ contains a total of 3 x 10²³ molecules?

• 1.0 moles
• 2.0 moles
• 16.0 grams
• 32.0 grams