What happens when the temperature of an object increases?
a) the objects particles move faster.
b) the number of the objects particles increases.
c) the objects particles stop moving.
d) the objects particles move closer together.

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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