A sample of 2.21 grams of Z is dissolved into 500 grams of water which is in a styrofoam
coffee cup. The temperature is monitored and
is found to drop from 23.512◦C to 23.269◦C.
What is ∆Hsolution for substance Z? Assume
no heat is lost/gained by the cup itself. The
specific heat of water is 4.184 J/g·
◦C and the
molecular weight of Z is 148 g/mol.
Answer in units of kJ/mol of Z.

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

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

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block