8. What is the sign of the enthalpy of combustion for sucrose? Explain your answer. (Modern chemistry interactive reader PG 519 Q8)

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer