It takes one gallon of gas to drive 25miles which measure of efficiency is an example

Word equation for k+ h2o yield koh + h2

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

What does an electron configuration for an atom relate to the atoms placement on the periodic table