A1 kg block of copper is hammered into a thin sheet. the length of the copper sheet is 30 cm. what is the mass of the copper sheet? a) 1 kg b) 30 kg c) 1.03 kg d) cannot be calculated at all

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next