Mole Conversion Practice Problems

How many moles of magnesium are in 3.01x10²² atoms of magnesium?

• 5.00x10⁴⁴ moles Mg

• 0.0500 moles Mg

• 1.81x10⁴⁶ moles Mg

• 5.00 moles Mg

How many grams of carbon are in 0.63 moles of carbon?

• 3.79x10²³ g C
• .0524 g C
• 7.57 g C
• .800 g C

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

• setup B : 0.6644mol Co

• setup A: 2.41x10⁴⁷mol Co

• setup A : 0.664mol Co

• setup B: 2.41x10⁴⁷mol Co

How many formula units are in 2.5 moles of NaCl?

• 1.5 x10²⁴ formula units

• 1.5 formula units

• 4.2 formula units

• 4.2 x10^-24 molecules

Tags

NGSS.HS-PS1-7

How many moles of copper are present in a sample that contains 4.57 x 10¹³ atoms of copper?

• 7.59 x 10^-11 moles

• 2.75 x 10³⁷ moles

• 7.59 x 10¹¹ moles

• 2.75 x 10³³ moles

How many grams are in 1.2 moles of neon?

• 0.059 grams

• 7.2 x 10²³ grams

• 2.0 x 10^-24 grams

• 24 grams

How many molecules are there in 31.8 moles of water?

• 5.28 x 10^-23 molecules

• 1.91 x 10²⁵ molecules

• 5.28x 10^-25 molecules

• 1.91 x 10²² molecules

How many formula units are there in 2.45 moles of potassium chloride?

• 4.07 x 10^-24

• 1.47 x 10²⁴

• 1.47

• 4.07

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

• 
• 
• 
• 

You have 8.65 x 10²⁵ atoms of arsenic. What is the mass of the sample?

• 144 g As
• 10,765 g As
• 107 g As
• None of these

Tags

NGSS.HS-PS1-7