Mole Unit Test Review

Front

Convert 5.50 moles of Mg to atoms of Mg. Round to the correct number of significant figures and include proper units.

Back

3.31 x 10^24 atoms Mg

Front

Calculate the mass of 6.730 moles of O2.

Back

215.4 g O2

Front

Determine the number of atoms in 742.59 g Cr.

Back

8.5998x10^24 atoms Cr

Front

What is defined as the number of atoms or molecules in one mole of a substance?

Back

Avogadro's number

Front

What is the mass of 8.45x10^73 atoms of iron?

Back

7.84x10^51 g Fe

Front

Define Avogadro's number.

Back

6.022 x 10^23, the number of particles in one mole of a substance.

Front

What is molar mass?

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you convert moles to grams?

Back

Multiply the number of moles by the molar mass of the substance.

Front

How do you convert grams to moles?

Back

Divide the mass of the substance by its molar mass.

Front

What is the formula to find the number of atoms from moles?

Back

Number of atoms = moles x Avogadro's number.