Stoichiometry- chemical calculations Flashcards by Shari Meier | Brainscape

Q

Relative atomic mass (Ar)

A

The average mass of naturally occurring atoms of an element on a scale, carbon has an exact mass of 12 in this scale

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Q

Relative molecular mass (Mr)

A

The sum of the relative molecular masses

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Q

Molecular formula

A

The molecular formula of oxygen is 16*2=32

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Q

Mole

A

A specific number of particles called Avogadro‘s constant (6.02*10 23)

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Q

Find no. Of moles

A

No. of moles = mass/Ar or Mr

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Q

Concentration

A

Can be measured in g/dm3 or mol/dm3 (3s are indices)

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Q

Molecular formula

A

The number and type of different atoms in one molecule

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