Question

Using your knowledge of symbols, determine which compound listed must contain both copper and oxygen. a.glucose, C6H12O6 b.chalcopyrite, CuFeS2 c.malachite, Cu2CO3(OH)2 d.calcite, CaCO3

Answer 1

The formula of malachite is \(Cu_2CO_3(OH)_2\). Obviously, C is the only option that both compounds have Cu and O.

Answer 2

• The correct option is Malachite which has both copper nd oxygen.

Explanation:

As we the symbol of copper is Cu while the symbols of oxygen is O. As the chemical formula of malachite is Cu₂CO₃(OH)₂. So it has Cu as well as O.

• Glucose has only oxygen but no copper
• Chalcopyrite has copper but no oxygen
• Calcite has oxygen but no copper.
• So correct answer is only malachite.