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Paper 2 · November 2013 · Stoichiometry and Mole Calculations

Copper metal is heated strongly in oxygen to form a black solid, B. What is B?

ACopper hydroxide

BCopper(I) oxide

CCopper(II) oxide

DCopper carbonate

Explanation

Copper heated in oxygen forms the black solid copper(II) oxide, CuO.

Derived from ZIMSEC Chemistry 5071/2 Paper 2 Theory, November 2013, Q3

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