What is the oxidation number of sulfur in the sulfate ion?

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration?

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.