Currently Severus is only using water as a solvent and thus can use only water-soluble compounds.
Which of the following can’t Severus use? That is, which one of the following is insoluble in water.
1. KCl
2. NH₄NO₃
3. NH₄Br
4. BaSO₄
5. NaC₂H₃O₂

Which of the following electromagnetic waves can create ions?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

In a heat engine of 1000 j of heat enters the system and the piston does 500 j of work what is the final internal energy of the system if the inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added