Which of these changes do not involve forming or breaking chemical bonds?

A.

burning and melting

B.

rusting and cutting

C.

burning and digesting

D.

boiling and melting

What is exchanged between two or more atoms that undergo ionic bonding?

What element makes protein different from carbohydrate and fat?

What are some chemacial changes in your school?

What does O - H ... O - H represent? Select one: a. hydrogen bond b. supersaturated solution c. covalent bond d. ionic bond

In each cycle of a Carnot engine, 104 J of heat is absorbed from the high-temperature reservoir and 51 J is exhausted to the lowtemperature reservoir. What is the efficiency of the engine?

1. Electronegativity is the ... a. amount of energy required to remove the most loosely bound electron from an atom. b. tendency of an atom to lose an electron to another atom. c.

What can the particles of a liquid do that the particles of a solid can't do?

What is the molarity of a solution prepared by dissolving 10.0g of kno3 in 250 ml of solution

What do nucleus act as

Change of state may occur when?