A physical change in matter is a change in size and shape, (through cutting, breaking, or grinding), or state, (through melting, boiling, freezing, evaporating, and condensing).

True

Or

False

How many moles are in 4.3 x 1022 molecules of H 3 PO 4?

Which statement describes a reversible reaction at equilibrium? (1) The activation energy of the forward reaction must equal the activation energy of the reverse reaction.

If bacteria tried to "friend" you one Facebook, why would you accept? Why would you block? LOL

What mass of calcium carbonate is produced when 250 mL of 6.0 M sodium carbonate is added to 750 mL of 1.0 M calcium fluoride

The change from liquid to solid, or the reverse of melting, is calleda. condensation. b. boiling. c. sublimation. d. freezing.

Why are phosphates in laundry detergent

What is the name of the scientist who discovered the electron

Which of these is not a covalent molecule? 1. F2 2. CO 3. LiF 4. NH3

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change