Molar Masses & Mass to Moles

Front

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

Back

99.4 g/mol

Front

How many moles are in 19.82 g of Mg?

Back

0.82 mol Mg

Front

Calculate the molar mass of KOH.

Back

56 g/mol

Front

Molar mass is in units of ________?

Back

grams/mole (g/mol)

Front

How many atoms or particles are in a mole?

Back

6.022 x 10²³

Front

Define molar mass.

Back

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

Front

What is Avogadro's number?

Back

6.022 x 10²³, the number of particles in one mole of a substance.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the molar mass of water (H₂O)?

Back

18 g/mol

Front

If you have 2 moles of NaCl, how many grams do you have?

Back

Molar mass of NaCl is 58.5 g/mol, so 2 moles = 117 g.