What color is coper oxide?

Answer 1

Noah Aldrich

#Cu_2O#: reddish-brown
#CuO#: black-dark gray

It depends on which oxide of copper is in question, #Cu_2O# or #CuO#.

#Cu_2O# is a reddish-brown color, and #CuO# is solid black to dark gray.

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Answer 2

Mateo Aguilar

Copper oxide can exist in different forms, each with its own color. Copper(I) oxide is typically red or reddish-brown, while copper(II) oxide is usually black.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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