1 A 0.651 g sample pure platinum metal was reacted with HCl to form 0.886 g of a compound containing only platinum and chlorine. What is the percent by mass of platinum in the compound?

Which one of the following gases is not an important component of soil?

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

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.