Which of the following is true for the theoretical yield of a reaction? (1 point) a it is always calculated as a ratio. b it is the yield from the excess reactant. c it is the yield from the limiting reactant. d it is always twice the value of the actual yield.

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