What is the activity of a 54.7 μci sample of carbon-14 in becquerels?

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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