2. Which of the following substances dissolve to a significant extent in water? Explain your answer
in terms of polarity.
b. KC1
d. MgSO4
e. Sucrose f. NaHCO,
a. CH4
C. He

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