Countries participate in global trade in order to: A. isolate themselves from volatile international markets.
B. increase the size of their trade deficit each year.
C. encourage citizens to emigrate to other countries.
D. obtain resources that aren't available at home.

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