Question

How many milliliters of 3 F ammonia can be prepared from 100ml of concentrated ammonia (28.4 per cent NH3 by weight, having a density of 0.808 grams per ml)?

Answer 1

$$m(conc.sol.) = 100mL*0.808g/mL = 80.8g$$

$$m(NH_3) = 0.284*80.8g = 0.2295g$$

$$n(NH_3) = n/M = 0.0135mol$$

Then, what is 3F?