Unit 5 Moles Mega Review

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

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

• 48 g/mole

• 34.02 g/mole

• 36.5 g/mole

• 35.5 g/mole

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 16.94g 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

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

• 24 molecules

• 180 molecules

• 180 g

• 6.02 x 10²³ molecules

Find the percent composition of hydrogen in (NH₄)₂S.

• 11.8%

• 41.1%

• 47.1%

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

• A

• B

• C

• D

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

• setup B : 0.6644mol Co

• setup A: 2.41x10⁴⁷mol Co

• setup A : 0.664mol Co

• setup B: 2.41x10⁴⁷mol Co

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

• 0.050 moles

• 1.81 x 10⁴⁶ moles

• 5.00 x 10²¹ moles

• 5.00 moles