Molar Mass and Mole Conversions Flashcard 2024

Front

What is a mole?

Back

A mole is a unit of quantity equal to 6.02 x 10^23 particles, known as Avogadro's number.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which represents 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 calcium chloride (CaCl2)?

Back

The molar mass of CaCl2 is approximately 110.98 g/mol.

Front

How many moles are in 455 g of calcium chloride (CaCl2)?

Back

4.10 moles.

Front

How do you convert moles to molecules?

Back

Number of molecules = moles x Avogadro's number (6.02 x 10^23).

Front

How many molecules are in 2.5 moles of NaCl?

Back

1.5 x 10^24 molecules.

Front

What is the molar mass of aluminum hydroxide (Al(OH)3)?

Back

The molar mass of Al(OH)3 is approximately 78.00 g/mol.

Front

How many moles are in 98.3 grams of aluminum hydroxide (Al(OH)3)?

Back

1.26 moles.

Front

How do you determine the mass of a substance from moles?

Back

Mass (g) = moles x molar mass (g/mol).