Tenorite (Cu 2 O) is an ore of copper. Given that copper has a mass of 63.5 and oxygen a mass of 16, calculate the percentage by mass of copper in tenorite.
Tenorite Grey 63 Amg Variant, Black 63 Amg Variant, Dolomite Brown 63 Amg Variant, Tenorite Grey Metallic, Diamond Silver 63 Amg Variant and Cavansite Blue 63 Amg Variant.
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