Molar Mass and Conversions Practice

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which represents the number of representative particles in one mole of a substance.

Front

What is the unit for measuring the amount of substance?

Back

The unit for measuring the amount of substance is the mole.

Front

How do you calculate molar mass using the periodic table?

Back

Molar mass is calculated by summing the atomic masses of all atoms in a molecule, as listed in the periodic table.

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water (H2O) is 18 g/mol.

Front

How do you convert moles to mass?

Back

To convert moles to mass, multiply the number of moles by the molar mass of the substance.

Front

What is the mass of 2.5 moles of water (H2O)?

Back

The mass of 2.5 moles of water is 45 g.

Front

How do you find the number of particles in a given mass of a substance?

Back

To find the number of particles, divide the mass of the substance by its molar mass to get moles, then multiply by Avogadro's number.

Front

How many particles are in 44.5g of KCN?

Back

There are approximately 4.11 x 10^23 particles in 44.5g of KCN.

Front

What is the formula to convert grams to moles?

Back

The formula to convert grams to moles is: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the relationship between moles and molar mass?

Back

Moles are a measure of the amount of substance, while molar mass is the mass of one mole of that substance.