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CAIE IGCSE Chemistry 3.2.2 Relative Molecular Mass Mr As the Questions

Calculate relative formula or molecular mass and use mass data to identify unknown atoms and compounds.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • calculate relative formula mass from a chemical formula
  • calculate relative molecular mass of simple molecules
  • deduce relative atomic mass from a compound formula
  • distinguish relative molecular and formula mass
  • use relative mass to determine unknown elements or atom counts

CAIE IGCSE Chemistry 3.2.2 Relative Molecular Mass Mr As the Questions question 1

[Maximum number: 1]

A compound of element X has the formula X2O\mathrm{X}_{2} \mathrm{O} and a relative formula mass of 144 . What is element X ?

A

copper, Cu

B

gadolinium, Gd

C

sulfur, S

D

tellurium, Te

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