The reaction 2 cu + o2 → 2 cuo has long been called an oxidation-reaction. copper also reacts with chlorine:

cu + cl2 → cucl2. in such a reaction:

a. copper is also oxidized even though no oxygen is present.
b. chlorine is oxidized.
c. oxidation occurs, but reduction does not.
d. there is no change in oxidation numbers.

How have the greenhouse gasses increased from the year 2000 to 2018

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If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.