a student mixes a solution of lead (ii) nitrate with a solution of potassium iodide and notices the formation of a yellow solid. what is the precipitate? how do you know?

When a septic tank backs up a goes in to clean it out

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

Apush or pull that moves or changes and object when to objects touch