Which property of a substance is not altered by a physical change?

What is the main reason a substance changes from one state of matter to another? A. The substance's color changes. B. The substance's temperature changes. C. The substance's size changes. D. The substance's shape changes.

How many grams of KCO3 are needed to make 20 L of a 2.5 M solution?

Enter a chemical equation for LiOH (aq) LiOH (aq) showing how it is an acid or a base according to the Arrhenius definition. Consider that strong acids and bases dissociate completely. Express your answer as a chemical equation.

What types of properties are used to describe matter

Which kind of bond is formed when two atoms share electrons to form a molecule?

When does raising the temperature of a gas increase its pressure? A. temperature B. volume C. number of particles D. pressure

Hexyne. What does the name of this hydrocarbon tell you about its molecular structure?

Which of the following processes includes all of the others? Group of answer choices transport of an ion down its electrochemical gradient osmosis passive transport facilitated diffusion

How is the Bohr atomic model different from the plum-pudding model? A. In Bohr's model, the atom's mass is found at its center instead of distributed throughout. B. In Bohr's model, the atom's mass is mostly made up of electrons instead of protons.

What does the cell theory state? A. that cells come from other cells B. that cells come only from animals C. that cells cannot be created or destroyed