Moles to grams and grams to moles

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express amounts of a chemical substance, defined as exactly 6.022 x 10^23 particles (atoms, molecules, ions, etc.).

Front

How do you convert moles to grams?

Back

To convert moles to grams, multiply the number of moles by the molar mass of the substance (grams per mole). Formula: grams = moles × molar mass.

Front

What is the molar mass of a substance?

Back

The 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. Formula: moles = grams / molar mass.

Front

What is the molar mass of copper sulfate (CuSO4)?

Back

The molar mass of copper sulfate (CuSO4) is 159.6 g/mol.

Front

If you have 20.0 g of LiCl, how many moles do you have?

Back

To find moles, use the formula: moles = grams / molar mass. Molar mass of LiCl is 42.39 g/mol, so moles = 20.0 g / 42.39 g/mol = 0.471 moles.

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What is the mass of 0.75 moles of potassium permanganate (KMnO4)?

Back

The molar mass of KMnO4 is 158.04 g/mol. Mass = moles × molar mass = 0.75 moles × 158.04 g/mol = 118.5 g.

Front

How many moles are in 8.40 grams of cobalt(II) nitrate (Co(NO3)2)?

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The molar mass of Co(NO3)2 is 182.9 g/mol. Moles = grams / molar mass = 8.40 g / 182.9 g/mol = 0.0459 moles.

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Which has more moles of particles: 12.0 g carbon, 6.94 g lithium, or 10.81 g boron?

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All have the same number of moles when calculated using their respective molar masses.

Front

What is the formula to calculate moles from volume and molarity?

Back

Moles = Molarity × Volume (in liters).