Unit 8 Review: The Mole

In chemistry, a mole is defined as -

• The smallest constituent unit of ordinary matter that constitutes a chemical element

• A metric system unit of mass

• A unit of measurement used to describe the number of particles (atoms, molecules, ions) in a substance

• A small, furry animal that digs holes in the ground

A mole of carbon atoms contains ____ atoms and weighs ____ grams.

• 6.02 x 10^23 atoms; 12.011 grams

• 12.011 atoms; 6.02 x 10^23 grams

• 6.02 x 10^23 atoms; 15.999 grams

• 15.999 atoms; 6.02 x 10^23 grams

Tags

NGSS.HS-PS1-7

When converting from grams to moles, you must -

• Multiply by Molar Mass

• Divide by Molar Mass

• Multiply by Avogadro's number

• Divide by Avogadro's number

When converting from moles to grams, you must -

• Multiply by Molar Mass

• Divide by Molar Mass

• Multiply by Avogadro's number

• Divide by Avogadro's number

How many grams are in 2.4 moles of sulfur?

• 32 grams

• 77 grams

• 0.07 grams

• 6.02 x 10^23 grams

How many moles are in 15 grams of lithium?

• 6.9 moles

• 104.1 moles

• 2.2 moles

• 6.02 x 10^23 moles

One mole is equivalent to all of the following EXCEPT -

• 6.02 x 10^23 particles

• 6.02 x 10^23 atoms or molecules

• 6.02 x 10^23 grams

• The molar mass

Tags

NGSS.HS-PS1-7

Calculate the molar mass of aluminum hydroxide, Al(OH)3.

• 43.989 g/mol

• 131.967 g/mol

• 78.01 g/mol

• 26.982 g/mol

Calculate the molar mass of sodium fluoride, NaF.

• 22.99 g/mol

• 18.998 g/mol

• 436.76 g/mol

• 41.99 g/mol

Tags

NGSS.HS-PS1-7

How many grams are in 4.5 moles of NaF?

• 190 g

• 0.107 g

• 42 g

• 107 g