How many atoms are present in 4.0 mol of sodium

The first element on the periodic table of elements is carbon. a. true b. false

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

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