Which one of the following is a "substance" in the sense of the word as used in your textbook?
A)Air
B)Tap water
C)Sea water
D)Water
E)Toothpaste

Question

Quizplus · Accepted Answer

A substance is a material with constant composition and distinct properties. Water is a substance because it has a fixed chemical composition of H2O molecules, and its properties such as boiling and freezing points, density, and solubility are consistent. Air and sea water are mixtures of different substances, while tap water and toothpaste are both solutions or colloidal suspensions made up of multiple substances.

Which One of the Following Is a "Substance" in the Sense