An isotope has 17 protons, 16 neutrons and 17 electrons. It's mass number is

What is the empirical formula for c4h8o2

What produces wave a)sound b) heats c)transfer of energy d)vibrations

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.