If it takes 1130 kJ of heat to boil 0.500 kg of water, what is the enthalpy of vaporization or
water?
0.5 kJ/kg
0 1130 kJ/kg
o 2260 kJ/kg
O 4520 kJ/kg

Does anyone know a lot about how to: - calculate mass of magnesium metal - calculate the actual yield of magnesium oxide - calculate the theoretical yield of mgo - calculate the percent yield of mgo - determine the percent yield of mgo - determine the average percent yield of mgo i had to do an online lab and its asking these questions but i have no idea where to start or how to be able to find these things. i can post the chart of the data from the lab or if you can tell me exactly how i can find each.

Wind and moving water provide energy. chemical mechanical thermal none of the above

What the blanks in these lines are ?