Mole Conversions

Front

What is a mole in chemistry?

Back

A mole is a unit of measurement used to express the amount of a substance. It is defined as the amount of substance that contains as many entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

Front

How do you convert grams to moles?

Back

To convert grams to moles, use the formula: Moles = Mass (g) / Molar Mass (g/mol).

Front

What is the molar mass of cobalt (Co)?

Back

The molar mass of cobalt is approximately 58.93 g/mol.

Front

How do you calculate the number of moles from mass?

Back

Number of moles = Mass of substance (g) / Molar mass of substance (g/mol).

Front

What is Avogadro's number?

Back

Avogadro's number is 6.022 x 10^23, which is the number of atoms, molecules, or particles in one mole of a substance.

Front

How do you find the mass of a substance from moles?

Back

To find the mass from moles, use the formula: Mass (g) = Moles x Molar Mass (g/mol).

Front

What is the molar mass of diphosphorus pentaoxide (P2O5)?

Back

The molar mass of diphosphorus pentaoxide is approximately 283.88 g/mol.

Front

How do you convert moles to molecules?

Back

To convert moles to molecules, use the formula: Molecules = Moles x Avogadro's number (6.022 x 10^23).

Front

What is the mass of 4.98 x 10^24 atoms of zinc (Zn)?

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To find the mass, first convert atoms to moles: Moles = 4.98 x 10^24 atoms / 6.022 x 10^23 = 8.27 moles. Then, multiply by the molar mass of zinc (65.38 g/mol) to get the mass.

Front

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

Back

First, convert the mass to moles using the molar mass, then multiply the number of moles by Avogadro's number.