Molar Mass and Percent Composition

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What is Molar Mass?

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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.

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How do you calculate the percent composition of a compound?

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Percent composition is calculated by dividing the mass of each element in a compound by the total molar mass of the compound, then multiplying by 100.

Front

What is the molar mass of Carbon (C)?

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The molar mass of Carbon (C) is 12.01 g/mol.

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What is the molar mass of Hydrogen (H)?

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The molar mass of Hydrogen (H) is 1.008 g/mol.

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What is the molar mass of Oxygen (O)?

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The molar mass of Oxygen (O) is 16.00 g/mol.

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Calculate the molar mass of H2O (water).

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The molar mass of H2O is 18.02 g/mol (2*1.008 + 16.00).

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What is the percent composition of water (H2O)?

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H: 11.19%, O: 88.81%.

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What is the molar mass of Sodium Chloride (NaCl)?

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The molar mass of NaCl is 58.44 g/mol (22.99 + 35.45).

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What is the percent composition of Sodium in NaCl?

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Sodium (Na) makes up 39.34% of NaCl.

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What is the percent composition of Chlorine in NaCl?

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Chlorine (Cl) makes up 60.66% of NaCl.