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4.4 - Moles I

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Total cards: 10•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (10)

#1
Front (Question)

calculate relative formula masses from relative atomic masses

Back (Answer)

Mr = sum of relative atomic masses

#2
Front (Question)

unit for amount of substance

Back (Answer)

mole (mol)

#3
Front (Question)

moles

Back (Answer)

mass / RFM

#4
Front (Question)

mass

Back (Answer)

moles x RFM

#5
Front (Question)

unit for relative formula mass

Back (Answer)

g mol -1

#6
Front (Question)

percentage yield

Back (Answer)

amount product produced / maximum amount of product possible x100

#7
Front (Question)

experiment to find formula of magnesium oxide

Back (Answer)

• weigh pure magnesium • heat in crucible to form magnesium oxide (reacts w/ air) • weigh mass of magnesium oxide oxygen mass = mass MgO - mass Mg calculate ratio of mol Mg to mol O - form empirical formula

#8
Front (Question)

molecular formula

Back (Answer)

number of atoms of each element in a compound

#9
Front (Question)

empirical formula

Back (Answer)

simplest whole number ratio of elements

#10
Front (Question)

molecular formula calculation

Back (Answer)

• find elements RFM • Mr/RFM • answer x empirical formula