91Ó°ÊÓ

Explain Avogadro's law using the kinetic-molecular theory of gases.

Assume that you have \(1.75 \mathrm{~g}\) of the deadly gas hydrogen cyanide, HCN. What is the volume of the gas at STP?

How does the ideal gas law differ from the combined gas law?

How many moles of a gas will occupy a volume of \(0.55 \mathrm{~L}\) at a temperature of \(347 \mathrm{~K}\) and a pressure of \(2.5 \mathrm{~atm} ?\)

Ethane-1,2-diol, \(\mathrm{C}_{2} \mathrm{H}_{6} \mathrm{O}_{2},\) has one OH bonded to each carbon. (a) Draw the Lewis dot structure of ethane-1,2-diol. (b) Draw the Lewis dot structure of chloroethane, \(\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}\). (c) Chloroethane has a slightly higher molar mass than ethane- 1,2 -diol but a much lower boiling point \(3{ }^{\circ} \mathrm{C}\) versus \(198^{\circ} \mathrm{C}\) ). Explain.