Mole Conversions

How many molecules are in 2.5 mol of NaCl?

• 1.5x10²³
• 4.2x10^-24
• 4.2
• 1.5x10²⁴

How many grams are in 3.30 mol of Potassium Sulfide?

• 364 g
• 110 g
• 6.64x10²⁵ g
• 0.030 g

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

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

How many moles are in 16.94 g of water?

• 0.7563 mol H₂O
• 0.9403 mol H₂O
• 305.2 mol H₂O
• 18.015 mol H₂O

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³
• 5.2
• 3.1304 x 10²⁴
• 8.638 x 10^-24

What is the mass in grams of 5.90 mol C₈H_18?

• .0516 g
• 132 g
• 674 g
• 114.232 g

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

• A
• B
• C
• D

A container with a volume of 893 L contains how many moles of air at STP?

• 20003.2 L
• 39.9 L
• 22.4 L
• none of the choices

Which of the following dimensional analysis setups will correctly convert 4.00x10²³ atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

• setup B : 0.664 mol Co
• setup A: 6.64x10⁴⁵ mol Co
• setup A : 0.664 mol Co
• setup B: 2.41x10⁴⁷ mol Co

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 = 39.948 g
• 1 mol = 6.02x10²³ atoms
• 1 mol = 79.896 g