6 multiple choice 1 point which of the following is a compound? oxygen (o₂) gold (au) carbon dioxide (co₂)…

Brief Explanations:

A compound is a substance made up of two or more different elements chemically combined. Oxygen ($O_2$), gold (Au), and nitrogen ($N_2$) are elements. Carbon - dioxide ($CO_2$) is made of carbon and oxygen elements, so it is a compound.

Answer:

C. Carbon dioxide ($CO_2$)