List three atoms or ions that have the same number of electrons as each of the following:
(a) S2− (b) Al3+ (c) P3− (d) Kr (e) Cs+

WILL GIVE 40 POINTS TO WHOEVER ANSWERS! :)

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

Consider the following reaction at equilibrium. 2co2 (g) 2co (g) + o2 (g) h° = -514 kj le châtelier's principle predicts that the equilibrium partial pressure of co (g) can be maximized by carrying out the reaction a. at high temperature and high pressure b. at high temperature and low pressure c. at low temperature and low pressure d. at low temperature and high pressure e. in the presence of solid carbon

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