Molar Conversions

Front

What is a mole in chemistry?

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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 sodium chloride (NaCl)?

Back

The molar mass of sodium chloride (NaCl) is approximately 58.44 g/mol.

Front

How many moles are in 321.8 g of sodium chloride?

Back

5.507 moles (calculated using the formula: Moles = Mass / Molar Mass).

Front

What is the molar mass of oxygen gas (O2)?

Back

The molar mass of oxygen gas (O2) is approximately 32.00 g/mol.

Front

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

Back

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

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How many atoms are in one mole of any substance?

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One mole of any substance contains Avogadro's number of entities, which is approximately 6.02 x 10^23.

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How do you find the number of atoms in a sample?

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To find the number of atoms in a sample, use the formula: Number of Atoms = Moles x Avogadro's Number.

Front

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

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The molar mass of carbon dioxide (CO2) is approximately 44.01 g/mol.

Front

How many atoms are in 456 g of carbon dioxide?

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1.871 x 10^25 atoms (calculated using the number of moles and Avogadro's number).