Drag each chemical equation to the correct location. Sort the chemical equations based on the chemical reactions they represent.
water hydrogen + oxygen
iron + oxygen iron oxide
sodium + chlorine
sodium chloride
sulfur + oxygen
sulfur dioxide
potassium + chlorine-
potassium chloride
calcium carbonate
calcium oxide + carbon dioxide
Synthesis
Decomposition

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