(b) The vapor pressure of mercury at 536 K is 103 torr. Estimate the normal boiling point of mercury, where the vapor pressure is 760 torr. The heat of vaporization of mercury is 58.7 kJ/mol. (10%)

6. One example of a first-order reaction is the isomerization of hydrogen isocyanide to hydrogen cyanide: . If the rate constant at a particular temperature is , what mass of HCN remains after 1.50 hr if a 1.000-gram sample of HNC was present at the beginning of the reaction? (10%)