A(n) is a group of two or more atoms that are held together by chemical bonds. *

When balancing a chemical equation:

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas