Calculating Mass of Substances (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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What is a mole in chemistry?
What is a mole in chemistry?
A unit used to count particles like atoms or molecules
Number of particles in one mole
Number of particles in one mole
Name for particles
Name for particles
Avogadro's number
Scientist who helped develop the mole concept
Scientist who helped develop the mole concept
Amedeo Avogadro
Why do chemists use moles?
Why do chemists use moles?
Atoms/molecules are too tiny to count individually
Mass of one mole equals this in grams
Mass of one mole equals this in grams
Relative atomic mass (Ar) or relative formula mass (Mr)
Mass of one mole of carbon
Mass of one mole of carbon
12 grams
Relative atomic mass (Ar) of carbon
Relative atomic mass (Ar) of carbon
12
Mass of one mole of water
Mass of one mole of water
18 grams
Relative formula mass (Mr) of water
Relative formula mass (Mr) of water
18