Mole and Avogadro number, Molar Mass

Front

What is the definition of Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23 particles per one mole of a substance.

Front

What is the molar mass of a substance measured in?

Back

Molar mass is measured in grams/mole.

Front

How many atoms are in 1 mole of a substance?

Back

1 mole of a substance contains 6.02 x 10^23 atoms.

Front

What is the molar mass of water (H2O)?

Back

The molar mass of water is approximately 18 g/mole.

Front

How do you calculate the number of molecules in a given number of moles?

Back

Multiply the number of moles by Avogadro's number (6.02 x 10^23).

Front

What is the molar mass of AuCl3?

Back

The molar mass of AuCl3 is 303.3 g.

Front

Which represents the greatest mass of sulfur? 1 gram, 1 molecule, 0.5 mole, or 6.02 x 10^23 atoms?

Back

6.02 x 10^23 atoms of sulfur represents the greatest mass.

Front

What is the relationship between moles and mass?

Back

Mass (in grams) = Moles x Molar Mass (g/mole).

Front

What is the formula to find the number of moles from mass?

Back

Number of moles = Mass (g) / Molar Mass (g/mole).

Front

If you have 5.2 moles of water, how many water molecules do you have?

Back

You have 3.1304 x 10^24 water molecules.