C4 Flashcards

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1
Q

Relative atomic mass, Ar

A

average mass of naturally occurring atoms of an element on a scale where the 12-carbon atom has a mass of exactly 12 units

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2
Q

Define relative molecular mass, Mr

A

the sum of the relative atomic masses (relative formula mass or Mr will be used for ionic compounds)

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3
Q

Avogadro’s number

A

-A mole contains 6.02 x 10^23 particles
-One mole of any substance contains this amount

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4
Q

Molar mass

A

-is the mass of one mole
-same as relative atomic mass for elements
- sum of the relative atomic masses for the formula for compounds
- add symbol for grams per mole

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5
Q

Limiting reactants

A

reactants that is used up first is the limiting reactant. The amount of products is directly proportionate to the amount of limiting reactant

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