SECTION 1 1.calculate the energy released by the reaction 4Fe(s)+3O2(g)---------2FeO3 (s) when a 55.8g sample...

SECTION 1 1.calculate the energy released by the reaction 4Fe(s)+3O2(g)---------2FeO3 (s) when a 55.8g sample of iron reacts completely with 1.00mole of O2. The enthalpy of formation (HF) of Fe2O3(s)is -826KJmol-1 2.which 0.10M aqueous solution exhibits the lowest electrical conductivity?a.HC2H2O2(aq) b.HNO3(aq) c.NH4C2H3O2(aq) d.Ca(NO3)2(aq) 3.a soluble is insoluble in water,does not conduct electricity and does not melt below 1000C.This solid can be? A.Pt b.SiC c.CsCl d.C10H22 4.which of the following is a non-electrolyte in aqueous solution? A.H2SO4 b.NaC2H3O2 c.k2CO3 d.CH2O 5.when sodium ethanoate undergoes hydrolysis,the resulting solution will be?(acidic,neutral,alkaline,or gives pure water) section 2 1.In the electrolysis of dilute hydrochloric acid,what will be given off or take place? 2.calculate the mass of potassium trioxocarbonate(iv)in 250cm3 of 0 .100moldm-3 solution(k2CO3=138gmol-1?

1 Answers Available
Asked by okochaemmanuel on 19th March, 2019