120.0 liters of a gas are prepared at a pressure of 300.0 mm Hg and a temperature of 100.0 °C. The gas is placed into a tank under high pressure. When the tank cools to 30.0 °C, the pressure of the gas is 30.0 mm Hg. What is the volume of the gas? A.674.8 L
B.774.8 L
C.874.8 L
D.974.8 L

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth