For the following reaction: S (s) + O2 (g) =SO2 (g) Elthalpy Change= -297kj/mol (a) Is this reaction exothermic or endothermic? (b) How does the heat content of 1 mole of SO2 compares to that of 1 mole of S plus 1 mole of O2?

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Which of the following is most likely true about water in chemical solutions?

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?