An aqueous solution contains 0.60 mol of KCl and 1.20 mol of NH4Cl what is the minimum number of moles of Pb(NO3)2 that must be added to precipitate of chloride ions?

Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3

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

What is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added