A solution containing 3.301 g of an unknown substance in 50.00 g of benzene has a freezing point of 1.30°C.
a) What is the molecular weight of the substance, based on the given freezing point?
b) A further, more detailed, analysis shows the compound to be 40.3% B , 52.2% N, and 7.5 H " all mass percent", what is the molecular formula of the substance?