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22 June, 15:35

What does the molar mass of an element represent?

the value of the element's atomic weight in units of grams per mole

the mass of 1 mole of the element

the mass of 1000 atoms of the element

both choices a and b

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  1. 22 June, 15:49
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    The answer is: both choices a and b.

    The base SI unit for molar mass is kg/mol, but chemist more use g/mol (gram per mole).

    For example, the molar mass of fluorine is 38.00 g/mol.

    M (F₂) = 2 · Ar (F) · g/mol.

    M (F₂) = 2 · 19.00 · g/mol.

    M (F₂) = 38.00 g/mol.

    Molar mass M represent the mass of a substance (in this example molecule of florine) divided by the amount of substance.

    Ar is the atomic weight of a chemical element (in this example fluorine).
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