In an endothermic reaction in going from the reactants to the products at the same temperature, the value of q is negative a. true b. false

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

An empty fuel tank can still contain and therefore can be even more dangerous than one full of liquid fuel.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins