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4.4 Moles

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

Card preview (8)

#1
Front (Question)

give another name for RFM

Back (Answer)

Mr or Ar

#2
Front (Question)

whatdoes RFM stand for

Back (Answer)

Relative Formula Mass

#3
Front (Question)

give the equation to find percentage by mass

Back (Answer)

([Ar(element)* no. of atoms] / Mr(compound)) * 100

#4
Front (Question)

give the equation lining Moles, mass, and RFM or Ar or Mr

Back (Answer)

Moles = Mass/ RFM

#5
Front (Question)

How do you find the EF of a compound? [3 points]

Back (Answer)

• divide % or mass by Mr • Divide ands from step 1 by smallest ans • write the EF using element symbols and integers

#6
Front (Question)

How to find the molecular formulae of something when given the RFM?

Back (Answer)

• calculate Mr of the EF • Divide RFM given by the calculated Mr • multiply the factor by the EF

#7
Front (Question)

how to find x when determining water of crystallisations? [5 points]

Back (Answer)

• find mass • RFM • mass/RFM • ans/lowest ans • round to find x.

#8
Front (Question)

Back (Answer)