How does a chemical equation support the law of conservation of matter?

The minerals found in bones are deposited by living cells called

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

Use the half-reactions of the reaction au(oh)3 + hi -> au +i2 +h2o to answer the questions