Assuming ideal behavior, which of the following gases will have the greatest volume at STP? (a) 0.82 mole of He, (b) 24 g of $\mathrm{N_2}$, or (c) $5.0\times10^{23}$ molecules of $\mathrm{Cl_2}$.

Assuming ideal behavior, which of the following gases will have the greatest volume at STP?
(a) $0.82$ mole of He.
(b) $24 \mathrm{~g}$ of $\mathrm{N}_2$.
(c) $5.0 \times 10^{23}$ molecules of $\mathrm{Cl}_2$.
Which gas will have the greatest density?

Calculate the densities (in $g / L$ ) of the following gases at $78^{\circ} \mathrm{F}$ and $13.6$ psi. (a) xenon (b) methane (c) acetylene, $\mathrm{C}_2 \mathrm{H}_2$

Consider the following gases, all at

$$\mathrm { STP } : \mathrm { Ne } , \mathrm { SF } _ { 6 } , \mathrm { N } _ { 2 } , \mathrm { CH } _ { 4 }$$

Which one would effuse more rapidly than

$$N_2?$$

In which of the following choices is the existence of Earth's unique atmosphere explained?
A. As Earth cooled, water vapour fell out of the atmosphere to form oceans.
B. When Earth formed, its atmosphere formed from gases most common in early solar systems.
C. Volcanic gases containing nitrogen were outgassed from Earth's interior.
D. Oxygen in Earth's atmosphere is a result of early life on Earth.
E. Ultraviolet radiation from the Sun freed hydrogen, allowing it to escape.

Under the same conditions of temperature and density, which of the following gases would you expect to behave less ideally: $\mathrm{CH}_4$ or $\mathrm{SO}_2$ ? Explain.

Under the same conditions of temperature and density which of the following gases would you expect to behave less ideally: $\mathrm{CH}_4, \mathrm{SO}_2$ ? Explain.

Whenever there is a total solar eclipse, you can see something like the image shown at right. Explain why the shape and extent of the glowing gases are observed to be different for each eclipse .

Under the same conditions of temperature and pressure, which of these gases would behave most ideally: $\mathrm{Ne}$, $\mathrm{N}_2$, or $\mathrm{CH}_4$ ? Explain.

A sample of $\mathrm{Cl}_2(\mathrm{~g})$ and $\mathrm{N}_2(\mathrm{~g})$ are both at $25^{\circ} \mathrm{C}$. Compare the average kinetic energy and the most probable speed of the molecules of the gases.

True or false? Organic compounds can be created by sending electric discharges through mixtures of gases, some of which might be similar to the early atmospheres of Earth or some exoplanets.

Which of these gases has the highest density at STP?

(a) $\mathrm{N}_2 \mathrm{O}$
(b) $\mathrm{NO}_2$
(c) $\mathrm{Cl}_2$
(d) $\mathrm{SO}_2$

Under the same conditions of temperature and pressure, which of the following gases would behave most ideally: $\mathrm{Ne}$, $\mathrm{N_2}$, or $\mathrm{CH_4}$? Explain.

Under the same conditions of temperature and pressure, which of the following gases would behave most ideally: $\mathrm{Ne}, \mathrm{N}_2$, or $\mathrm{CH}_4$ ? Explain.