Which statement about a chemical reaction is true?
it occurs only at low temperatures.
it occurs only at high temperatures.
it occurs whenever a physical change takes place
it occurs whenever a chemical change takes place.

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes

Which description best characterization the motion of particles in a solid

If a molecule is polar, what kind of bonds will it have