Question

A 6.42% (w/w) Fe(NO3)3 solution has a density of 1.059 g/mL. Calculate:

The molar concentration of Fe(NO3)3 in this solution.
The mass in grams of Fe(NO3)3 contained in each liter of this solution.
500 mL of 4.75 % (w/v) aqueous ethanol.

Answer 1

Four meiotic divisions are required for the formation of four oospheres and only one meiotic division for the formation of four male gametes. The later is enclosed permanently inside ovule, that ripens into seed.