Calculate the percentage of Copper in Copper oxide (CuO, Mr=80). (3 marks)
Ar of Cu = 64 (1 mark) Percentage of copper in CuO = 64/80 x100 (1 Mark) Percentage of copper in CuO = 80% (1 mark)
KD
Related Chemistry GCSE answers
All answers ▸What name is given to the elements on group 7 of the periodic table and what happens to their boiling point as you go down the column?
Sodium Hydroxide can react with sulfuric acid in an acid base reaction. Outline the equation for this reaction, name the product. Finally a titration reaction is conducted. Determine the mass of NaOH needed to neutralise 12.4cm^3 of 0.10moldm^-3 H2SO4.
What does Avogadro's number mean?
Describe covalent bonding