Molar Mass

Front

What is molar mass?

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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 the atoms in a molecule.

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NGSS.HS-PS1-7

Front

How do you calculate the molar mass of a compound?

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To calculate the molar mass of a compound, identify the number of each type of atom in the molecule, multiply the atomic mass of each element by the number of atoms, and then sum these values.

Front

What is the molar mass of water (H2O)?

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The molar mass of water (H2O) is approximately 18.02 g/mol, calculated as (2 x 1.01 g/mol for H) + (16.00 g/mol for O).

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, calculated as (12.01 g/mol for C) + (2 x 16.00 g/mol for O).

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What is the molar mass of sodium chloride (NaCl)?

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The molar mass of sodium chloride (NaCl) is 58.44 g/mol, calculated as (22.99 g/mol for Na) + (35.45 g/mol for Cl).

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What is the molar mass of magnesium fluoride (MgF2)?

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The molar mass of magnesium fluoride (MgF2) is 62.31 g/mol, calculated as (24.31 g/mol for Mg) + (2 x 19.00 g/mol for F).

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What is the molar mass of strontium sulfide (SrS)?

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The molar mass of strontium sulfide (SrS) is 119.69 g/mol, calculated as (87.62 g/mol for Sr) + (32.07 g/mol for S).

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What is the molar mass of aluminum nitrate (Al(NO3)3)?

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The molar mass of aluminum nitrate (Al(NO3)3) is 213.01 g/mol, calculated as (26.98 g/mol for Al) + (3 x (14.01 g/mol for N + 3 x 16.00 g/mol for O)).

Front

Why is it important to know the molar mass of a substance?

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Knowing the molar mass is essential for converting between grams and moles, which is crucial for stoichiometry in chemical reactions.

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What is the significance of the periodic table in calculating molar mass?

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The periodic table provides the atomic masses of elements, which are necessary for calculating the molar mass of compounds.