What is one thing that all polysaccharides have in common?

a. the amount of branching remains constant.

b. the number of glucose molecules is always the same.

c. glucose molecules are always bonded to each other in the same way.

d. all polysaccharides are made up of carbon, hydrogen, and oxygen.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

)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.