How many bonds and lone pairs are in one molecule of hydrazine n2h4

What does the cell nucleus do or, how does it function?

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

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