Chemistry 0620 · IGCSE · Formulae

Formulae — practice question

Which of the following is the correct formula for the named compound?

  • Acalcium oxide, $\text{CaO}$
  • Bcobalt(II) chloride, $\text{Co}_2\text{Cl}$
  • Csulfur dioxide, $\text{S}_2\text{O}_2$
  • Danhydrous copper(II) sulfate, $\text{Cu( SO}_4)_2$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI