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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 the same number of entities (atoms, molecules, etc.) as there are in 12 grams of carbon-12.

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How do you convert atoms to moles?

Back

To convert atoms to moles, divide the number of atoms by Avogadro's number (6.022 x 10^23).

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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.

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How many moles are in 3.01 x 10^22 atoms of magnesium?

Back

0.0500 moles Mg (calculated by dividing 3.01 x 10^22 by Avogadro's number).

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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 (in g/mol).

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What is the molar mass of carbon?

Back

The molar mass of carbon is approximately 12.01 g/mol.

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How many grams are in 0.63 moles of carbon?

Back

7.57 g C (calculated by multiplying 0.63 moles by the molar mass of carbon).

Front

How do you convert moles to formula units?

Back

To convert moles to formula units, multiply the number of moles by Avogadro's number.

Front

How many formula units are in 2.5 moles of NaCl?

Back

1.5 x 10^24 formula units (calculated by multiplying 2.5 moles by Avogadro's number).

Front

What is dimensional analysis in chemistry?

Back

Dimensional analysis is a method used to convert between units by multiplying by conversion factors that relate the units.