A chunk of Sulfur, mined from an active volcano in Indonesia, has a mass of 12 grams. It displaces 6 milliliters of water when carefully lowered into a graduated cylinder (this is how much space it takes up). What is the density of Sulfur?

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