Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?
A.
mixture
B.
element
C.
atom
D.
compound

CO2 is formed when two oxygen atoms chemically combine with a carbon atom. So therefore the correct answer would be D, compound.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume