Which of these statements are not true about a chemical reaction rate? a)temperature does not affect the reaction rate. b)temperature can decrease the reaction rate. c)the amount of reactants can increase the reaction rates. d)temperature can change a reaction rate.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.