Which has more mass, a mole a Ne gas or a mole of $\mathrm { N } _ { 2 }$ gas?

A sample of argon gas has a volume of 735 mL at a pressure of 1.20 atm and a temperature of 112 $\degree$ C. What is the final volume of the gas, in milliliters, when the pressure and temperature of the gas sample are changed to the following, if the amount of gas does not change?

Compare your answers with those at the back of the book.

A pitcher throws a fastball. When the catcher catches it, (4.2)

(a) positive work is done

(c) the net work is zero

(b) negative work is done

A cylinder contains nitrogen gas. A piston compresses the gas to half its initial volume. Afterward, a. Has the mass density of the gas changed? If so, by what factor? If not, why not? b. Has the number of moles of gas changed? If so, by what factor? If not, why not?

Jason has less than 65 pages of his book left to read. Which inequality represents this situation? $(F) p>65 \quad (H) p<65$

$$(G) p\ge65 \quad (I) p\le65$$

Describe two examples of how living in a group can benefit an animal.

A 2.00-mol sample of helium gas initially at 300 K and 0.400 atm is compressed isothermally to 1.20 atm. Noting that the helium behaves as an ideal gas, find (a) the final volume of the gas, (b) the work done on the gas, and (c) the energy transferred by heat.

Prove that the group $\mathbf { C } ^ { * } / \mathbf { R } ^ { * }$ has infinite order.

Determine whether each statement makes sense or does not make sense, and explain your reasoning. The balance due on my credit card from last month to this month increased even though I made no new purchases.

Show that, taking the Earth’s rotation and revolution into ac- count, a book resting on your table moves faster at night than it does during the daytime. In what reference frame is this statement true?

Review the Samsung balance sheet in Appendix A. Identify three current liabilities and three noncurrent liabilities in its balance sheet.

Nitrogen gas in an expandable container is cooled from $50.0^{\circ} C \text { to } 10.0^{\circ} C$ with the pressure held constant at $3.00 \times 10^{5} \mathrm{Pa}$. The total heat liberated by the gas is $2.50 \times 10^{4} J$. Assume that the gas may be treated as ideal. Find (a) the number of moles of gas; (b) the change in internal energy of the gas; (c) the work done by the gas. (d) How much heat would be liberated by the gas for the same temperature change if the volume were constant?

Under which conditions does a real gas behave most like an ideal gas?

A real gas cools during a free expansion, though an ideal gas does not. Explain.