Molar mass and mole-mass 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). It is calculated by summing the atomic masses of all atoms in a molecule.

Front

How do you convert grams to moles?

Back

To convert grams to moles, divide the mass of the substance (in grams) by its molar mass (in g/mol). Formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

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

Back

The molar mass of CO2 is approximately 44.01 g/mol (12.01 g/mol for carbon + 2 x 16.00 g/mol for oxygen).

Front

If you have 176 grams of CO2, how many moles do you have?

Back

About 4 moles (176 g / 44.01 g/mol ≈ 4 moles).

Front

What is the molar mass of sodium sulfate (Na2SO4)?

Back

The molar mass of Na2SO4 is approximately 142.05 g/mol (2 x 22.99 g/mol for sodium + 32.07 g/mol for sulfur + 4 x 16.00 g/mol for oxygen).

Front

How many grams are in 2.50 moles of sodium sulfate?

Back

355.13 grams (2.50 moles x 142.05 g/mol = 355.13 g).

Front

What is the molar mass of calcium chlorate (Ca(ClO3)2)?

Back

The molar mass of Ca(ClO3)2 is approximately 206.98 g/mol (40.08 g/mol for calcium + 2 x (35.45 g/mol for chlorine + 3 x 16.00 g/mol for oxygen)).

Front

What mass corresponds to 0.750 moles of calcium chlorate?

Back

155.24 grams (0.750 moles x 206.98 g/mol = 155.24 g).

Front

How do you convert grams of a substance to moles?

Back

Use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of magnesium nitrate (Mg(NO3)2)?

Back

The molar mass of Mg(NO3)2 is approximately 148.31 g/mol (24.31 g/mol for magnesium + 2 x (14.01 g/mol for nitrogen + 3 x 16.00 g/mol for oxygen)).