Avogadro and Moles

Front

What are the units of molar mass?

Back

grams/mole

Front

Find the molar mass of KCl.

Back

74 g/mol

Front

Why is the mole used in chemistry?

Back

It makes counting large numbers of small particles easier.

Front

Which of the following is the correct mole/Avogadro conversion factor?

Back

6.02x10^23 molecules / 1 mole

Front

What is the molar mass of table salt (NaCl)?

Back

58.443 g/mol

Front

Define Avogadro's number.

Back

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

Front

What is a mole in chemistry?

Back

A unit that measures the amount of substance, equivalent to Avogadro's number of particles.

Front

How do you calculate molar mass?

Back

Add the atomic masses of all atoms in a molecule.

Front

What is the significance of the mole concept?

Back

It allows chemists to count particles by weighing them.

Front

Convert 2 moles of NaCl to grams.

Back

2 moles NaCl = 116.886 g (2 x 58.443 g/mol).