Is the reaction of sulfuric acid with magnesium exothermic or endothermic?

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .