25.0mL of 0.052 M of Pb(NO3)2 and 25.0mL of 0.0125 M of Pb(NO3)2 are mixed. Calculate the molarity of the resulting solution.

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample? a. naphthalene, a molecular solid with the formula c10h8 b. silica, a network solid held together by covalent bonds with the formula sio2 c. calcium chloride, an ionic compound with the formula cacl2 d. water, an molecular compound with the formula h2o