Question 3 Two chemica properties of a firework exploding would be
A
combustibility and ductility.
B
change of color and ductility.
с
flammability and combustibility.
D
malleability and change in color.

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