Chapter 9: Q76 E (page 511)
A 2.50Lsample of a colorless gas at STP decomposed to give 2.50L of N2 and 1.25L of O2 at STP. What is colorless gas?
The colorless gas's formula is N2O or dinitrogen oxide.
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A litre of methane gas, \({\rm{C}}{{\rm{H}}_4}\), at STP contains more atoms of hydrogen than does a litre of pure hydrogen gas, \({{\rm{H}}_2}\), at STP. Using Avogadro's law as a starting point, explain why.
Question: Under which of the following sets of conditions does a real gas behave most like an ideal gas, and for which conditions is a real gas expected to deviate from ideal behaviour? Explain.
(a) high pressure, small volume
(b) high temperature, low pressure
(c) low temperature, high pressure
How would the use of a volatile liquid affect the measurement of gas using open-ended manometers vs. closed-end manometers?
Question: During the discussion of gaseous diffusion for enriching uranium, it was claimed that \(^{{\rm{235}}}{{\rm{U}}_{\rm{6}}}\) diffuses 0.4% faster than\(^{{\rm{235}}}{{\rm{U}}_{\rm{6}}}\). Show the calculation that supports this value. The molar mass of \(^{{\rm{235}}}{{\rm{U}}_{\rm{6}}}{\rm{ = 235}}{\rm{.043930 + 6 \times 18}}{\rm{.998403 = 349}}{\rm{.034348 g/mol}}\), and the molar mass of \(^{{\rm{238}}}{{\rm{U}}_{\rm{6}}}{\rm{ = 238}}{\rm{.050788 + 6 \times 18}}{\rm{.998403 = 352}}{\rm{.041206 g/mol}}\).
One molecule of haemoglobin combines with four molecules of oxygen. If \(({\rm{1}}{\rm{.0 g}}\) of haemoglobin combines with \(({\rm{1}}{\rm{.53 mL}}\) of oxygen at body temperature (\(({\rm{3}}{{\rm{7}}^{\rm{o}}}{\rm{C}}\)) and a pressure of \(({\rm{743 torr}}\), what is the molar mass of haemoglobin?
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