Moles and Molar Mass Calculations

Front

What is the molar mass of H2O?

Back

18 g/mol

Front

How many grams are in 5.00 moles of H2?

Back

10.0 g

Front

How many moles are in 128 g of O2?

Back

4.00 mol

Front

If there are 2.5 moles of MgCl2, how many grams of MgCl2 are there?

Back

235 g

Front

How many moles are in 22 grams of argon (Ar)?

Back

0.5 moles

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

Front

How do you calculate the number of moles from grams?

Back

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

Front

What is the molar mass of NaCl?

Back

58.44 g/mol.

Front

How many grams are in 3 moles of CO2?

Back

132 g (3 moles x 44 g/mol).