Question

Which substance is a compund

A.) Li
B.) N2
C.) H2
D.) CO2

Atoms of what two elemts are in a every organic compound 

A.) calicum and helium
B.) carbon and oxygen
C.) cobalt and hydrogen  
D.) carbon and Hydrogen

Answer 1

Answers:
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1) [D]: " CO₂ " .

Note: This is the only answer choice given that is composed of: "at least two different elements" .
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2) [D]: "carbon and hydrogen" {"C" and "H" .} .
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