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Quantities used in chemistry
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Total cards: 8•Content version: v3•Public deck•Updated: 8/1/2026
Card preview (8)
#1
Front (Question)
What do moles measure?
Back (Answer)
Number of particles in a substance
#2
Front (Question)
Mole = ?
Back (Answer)
Mole = Mass / Mr
#3
Front (Question)
What is Ar?
Back (Answer)
Mass in one mole of an element. (Atomic mass)
#4
Front (Question)
What is Mr?
Back (Answer)
Sum of all the masses in a compound. (Relative formula mass)
#5
Front (Question)
What is empirical formula?
Back (Answer)
Ratio between elements in a chemical compound.
#6
Front (Question)
Empirical formula calculation?
Back (Answer)
Divide both masses by Ar and find the ratio.
#7
Front (Question)
Number of moles = ?
Back (Answer)
Number of moles = Molarity x Volume
#8
Front (Question)
percentage yield = ?
Back (Answer)
actual/expected (x100)