Determine the molecular weight and the formula of b-carotene?

Elemental ysis of b-carotene, a dietary source of vitamin A, shows that it contains 10.51% H and 89.49% C. Dissolving 0.0250 g of b-carotene in 1.50 g of camphor gives a freezing point of 178.63�C. Determine the molecular weight and the formula of b-carotene? Tf for camphor is 179.80�C and Kf for camphor is 37.7 �C kg/mol