Question

Working in a tent­lab deep in the remote Amazon rain forest, you have (carefully) isolated 12.5 micrograms (12.5 ×10–6 g) of what you hope is pure epibatidine (a non­electrolyte) from a poisonous (and quite cross) tree frog.  You dissolve this sample in 3.10 mL of water and determine that the osmotic pressure of the resulting solution is 0.371 torr at 35ºC (760 torr = 1.00 atm).  What is the molar mass of the compound?

Mm:___________ g/mol

Answer 1