Which substance is a compound?

There is a difference between a chemical mixture and a chemical compound. The properties of a mixture can vary because the amount of each material in the mixture is not always the same. A compound, however, is always composed of a definite amount of particular elements.

Which substance is a compound?
A . city air
B . salad dressing
C . water
D . concrete
E . toothpaste

View Answer

Answer: C