Assume 3 molecules of fe react according to the following equation. 3fe + 4h2o fe3o4 + 4h2 how many molecules of h2 are produced? how many water molecules are required? what is the mole ratio of fe to h2o? how many hydrogen molecules (h2) are involved in this reaction?

How does the viscosity of magma change as magma cools?

‘which reaction would most likely require the use of an inert electrode?

)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.