1. What is the change in the internal energy of a system that absorb 1,200 J of heat and that does 7,218 J of work on the surroundings at constant pressure?

How can you use chemical equations to predict the products of the reaction you can carry out?

Can someone me with these questions plz.

Five different substances are given to you to be dissolved in water. which substances are most likely to undergo dissolution in water? check all that apply. view available hint(s) check all that apply. sodium fluoride, naf octane, c8h18 propanol, ch3ch2ch2oh potassium iodide, ki benzene, c6h6