Final Review: The Mole CP chem

How many molecules are in 2.5 mol of NaCl?

• 1.5 x10²³

• 150

• 4.2 x 10^-24

• 1.5 x10²⁴

How many grams are in 3.3 mol of K₂S?

• 360 g

• 450 g

• 0.030 g

• 33 g

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

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

The number 6.02 x 10²³, which is the number of particles found in a mole. 

• molar mass
• mole
• Avogadro's number
• hydrate

How many moles are in 16.94 g of water?

• 16.94 mol H₂O
• 0.9401 mol H₂O
• 305.3 mol H₂O
• 1.063 mol H₂O

How many molecules are in 9.44 moles of AlCl₃?

• 5.68 molec AlCl₃
• 5.68x10²⁴ molec AlCl₃
• 0.705 molec AlCl₃
• 1.25x10²³ molec AlCl₃

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

• A
• B
• C
• D

Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?

• A
• B
• C
• D

What is the conversion factor that should be used to determine how many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

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Why is the mole used in chemistry?

• The mass of atoms is in AMUs which is too hard to convert to grams.

• A dozen is not a scientific amount.

• Chemists needed to make chemistry easier to understand.

• It makes counting large numbers of small particles easier.