An example of a chemical change is Mashing potatoes
Dew disappearing from the grass
Frying a hamburger
A magnet sticking to the refrigerator

40dm3 of gas at 760 torr are heated from 5°c to 50°c what is the new volume

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products

What is the amount of energy for a photon that has a 125 cm wavelength