If there are 0.20 moles of CO2, how many CO2 molecules are there?

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

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements. p o k mg