3. Calculate the percentage yield of iron in the following reaction where 240g of
iron(III) oxide produces 140g of iron.
Fe,03
3 CO
2 Fe
.
3 CO
160
56

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b

The nationalists army held a higher advantage because of the ammount of men in the army. outnumbered them up to 3 over 1.