Which of these properties is a physical property of aluminum?

a.
aluminum rusts when it is exposed to moisture and air.

b.
aluminum is a good conductor of heat.

c.
aluminum reacts with oxygen to form aluminum oxide.

d.
aluminum reacts with hydrochloric acid to give off aluminum chloride and hydrogen gas.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

)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.

A650 ml sodium bromine solution has a bromide ion concentration of 0.245 m. what is the mass (g) of sodium bromide in solution? a) 103.b)0.00155.c)16400.d) 16.4.e) 0.159