When does a change in energy occur?

1. In some physical changes, but not all.

2. In every physical change, but not in a chemical change.

3. In every chemical or physical change.

Question 1 how much water would you add to 175 ml of 6.00 m hydrochloric acid to prepare a 2.00 m solution of this acid? 350 ml 700. ml 58.3 ml 525 ml none of the above

What should Molly do to treat her burn?

Unlike kinetic energy, potential energy is a. energy of motion. b. stored. c. conserved. d. not measurable.

Ca+O2➡CaO what is the balance chemical equation

An unstable nucleus which starts a decay process is called the parent nuclide. True False

159 l of hydrogen gas reacts with excess chlorine gas. what is the maximum amount of gas product that can be formed at stp

You and your friends are at the park on a sunny day, and you are playing on the slide. As you sold down, the hot slide burns your legs. Explian why this happened and why you didn't burn your hands when you climbed up the rope ladder

The physical properties of a compound are similar to those of its elements. true or false

How many grams of water can form if 113 g of acetylene is burned?

A cracker crushed in water will test positive with iodine but negative with benedict's solution. A cracker crushed in water has another chemical called amylase added to it.