what is the vapour pressure at 298K of a 20% solution of KNO3 by mass. Vapour pressure of water at 298K is 3.2kPa

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.