What is produced during the replacement reaction of Cu(NO3)2 and Zn? ZnNO3 + Cu
Zn + Cu(NO3)2
ZnCu + 2NO3
Zn(NO3)2 + Cu

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.

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

Which of the following is true about the products formed during photosynthesis? (5 points) select one: a. they have the same mass as the mass of reactants. b. they are the same set of compounds as the reactants. c. they have more mass than the mass of reactants. d. they are chemically the same as the reactants.