Cold packs are designed to become very cold when activated. when the pack is activated, a chemical reaction occurs to make the temperature of the cold pack decrease. what must be true of this chemical reaction? (2 points) a. the reaction releases energy to its surroundings. b. the products and reactants have the same amount of energy. c. the products have less energy than the reactants. d. the reaction absorbs energy from its surroundings.

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating

Examine the false statement. compounds are the smallest unit of an element that occur most commonly in nature. select the rewording of the statement that is true. a: atoms are the smallest unit of an element that commonly occur in nature. b: molecules are the smallest unit of an element or compound that commonly occur in nature. c: molecules are the smallest unit of a compound that occur on the periodic table. d: compounds are the smallest unit of an element that occur on the periodic table

Explain how to convert from one unit to another in the metric system.