Ahousehold receives a $146 electricity bill. the cost of electricity is $0.129/kwh. how much energy, in joules, did the household use?

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 moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

Which of the following molecules is polar? c3h7oh c2h5cooh