Molar Mass & Mole Conversions Warm Up Review

The mass of a molecule is found by

• adding the masses of all the atoms in the molecule.

• dividing the total mass of all the atoms in the molecule by 6.022 x 10²³.

• multiplying the total mass of all the atoms in the molecule by 6.022 x 10²³.

• dividing the total mass of all the atoms in the molecule by the total number of atoms.

For any molecule, formula unit, or ion, the sum of the average atomic masses of all the atoms represented in a formula is the

• formula mass.

• ionic mass

• molecular mass

• atomic mass

What is the correct formula mass for zinc hydroxide, Zn(OH)₂?

• 83.41 g

• 99.41 g

• 83.41 amu

• 82.38 g

One mole of potassium atoms has a mass of

• 1 g

• 39.10 g

• 78.20 g

• 6.022 x 10²³ g.

A compound's molar mass is numerically equal to

• the total number of atoms in the molecule.

• the total number of moles of the compound.

• its mass number.

• its formula mass.

How many total moles of atoms are there in one mole of silver(I) phosphate, Ag₃PO₄?

• 3

• 7

• 8

• 11

What is the correct molar mass of Ag₃PO₄?

• 418.58 g/mol

• 387.61 g/mol

• 154.84 g/mol

• 52.32 g/mol

Which statement shows how to correctly convert from the mass of a compound in grams to the amount of that compound in moles?

•  $\frac{molar\ mass\ \left(g\right)}{1\ mol}\times\frac{1}{mass\ \left(g\right)}$  

•  $\frac{\left(molarmass(g\right)}{mol}x\ 6.022x10^{23}$  

•  $mass\ \left(g\right)\ x\ \frac{molarmass\left(g\right)}{1\ mole}$  

•  $mass\ \left(g\right)\ x\ \frac{1\ mole}{molar\ mass\ \left(g\right)}$