A sample of nicotine, a poisonous compound found in tobacco leaves, is 74.0% C, 8.7% H, and the remainder is nitrogen. If the molar mass of nicotine is about 162 g, what is the molecular formula of nicotine?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.

Which is true about metals used for jewelry, such as platinum and gold? a. they have low flammability. b. they have low reactivity. c. they have high flammability. d. they have high reactivity.