Ms. Geraets - The Mole and Molar Mass

Front

Molar mass is in units of ________.

Back

grams/mole

Front

What is the mass of 1 mole of Co(NO₃)₂ cobalt(II) nitrate?

Back

182.9 g/mol

Front

1 mole is equivalent to ________.

Back

6.02 x 10²³ (Avogadro's number)

Front

What is the mole used for?

Back

To measure the amount of atoms or molecules in a substance.

Front

1 mole of Ca and 1 mole of Na have the same number of atoms. True or False?

Back

True

Front

Define 'mole' in chemistry.

Back

A mole is a unit that measures the amount of substance, defined as containing exactly 6.02 x 10²³ entities (atoms, molecules, etc.).

Front

What is Avogadro's number?

Back

6.02 x 10²³ entities per mole.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all atoms in the compound's formula.

Front

What is the molar mass of NaCl (sodium chloride)?

Back

58.44 g/mol

Front

If you have 2 moles of a substance, how many molecules do you have?

Back

1.204 x 10²⁴ molecules (2 moles x 6.02 x 10²³ molecules/mole).