Chemistry - 4 Chemical Calculations - 4.1 Relative Masses and Moles

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8 Terms

1

Relative atomic mass

The weighted mean mass of an atom (including isotopes) of an element compared with 1/12 of the mass of an atom of carbon-12.

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2

Symbol for relative atomic mass:

Aᵣ

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3

Relative formula mass

The sum of the relative atomic masses of the elements as given in the formula for any non-molecular compound.

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4

Symbol for relative formula mass:

Mᵣ

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5

Avogadro's constant

6.02 × 10²³

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6

What is one mole of any substance?

the amount of that substance that contains 6.02 x 10²³ particles

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7

The mass (in g) of one mole of any substance will be the same as...

the substance's relative/formula mass

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8

number of moles =

Mass in g / Mr

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