If 5.13 L of hydrogen gas, measured at a temperature of 10.0 degrees Celsius and a pressure of 83.5 kPa is burned in excess oxygen to form water, what mass of oxygen (measured at the same temperature and pressure) will be consumed? Assume temperature and pressure remain constant.

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

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