Pressure of A Gas Chemistry Worksheet
Homework 16. According to one theory, the pressure of a gas increases as its volume decreases because the
molecules in the gas have to move a shorter distance to hit the walls of the container. Does this
theory follow a macroscopic or microscopic description of chemical behavior? Explain your
20. We refer to astronauts in space as weightless, but not without mass. Why?
28. Classify each of the following changes as physical or chemical:
(a) coal burning
(b) ice melting
(c) mixing chocolate syrup with milk
(d) explosion of a firecracker
(e) magnetizing of a screwdriver
40. A large piece of jewelry has a mass of 132.6 g. A graduated cylinder initially contains 48.6
mL water. When the jewelry is submerged in the graduated cylinder, the total volume increases
to 61.2 mL.
(a) Determine the density of this piece of jewelry.
(b) Assuming that the jewelry is made from only one substance, what substance is it likely to be?
68. A very good 197-lb weight lifter lifted 192 kg in a move called the clean and jerk. What was
the mass of the weight lifted in pounds?