Molar Mass and Gram/Moles Conversions

Front

What is molar mass?

Back

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

How do you calculate the molar mass of a compound?

Back

To calculate the molar mass, sum the atomic masses of all atoms in the compound's formula. For example, NaOH: Na (23) + O (16) + H (1) = 40 g/mol.

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How many grams are in 1 mole of water (H2O)?

Back

The molar mass of water (H2O) is 18 g/mol (H: 1x2 + O: 16). Therefore, 1 mole of water weighs 18 grams.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: moles = grams / molar mass.

Front

How do you convert moles to grams?

Back

To convert moles to grams, use the formula: grams = moles x molar mass.

Front

What is the molar mass of carbon dioxide (CO2)?

Back

The molar mass of CO2 is 44.01 g/mol (C: 12 + O: 16x2).

Front

How many moles are in 100 grams of NaCl?

Back

To find moles, use the formula: moles = grams / molar mass. Molar mass of NaCl is 58.44 g/mol, so moles = 100 g / 58.44 g/mol = 1.71 moles.

Front

How many molecules are in 0.5 moles of NaCl?

Back

To find the number of molecules, use the formula: molecules = moles x Avogadro's number. So, 0.5 moles x 6.02 x 10^23 = 3.01 x 10^23 molecules.

Front

What is the relationship between moles and molecules?

Back

1 mole of any substance contains Avogadro's number (6.02 x 10^23) of molecules.