What type of compound is NaBr?

In which situation can a mixture always be called a solution

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 are the coefficients to balance the following equation? ba+br2=babr2