Pheromones are chemical substances secreted by members of a species to stimulate a response in other individuals of the same species. for example, certain pheromones are secreted by females of a species to attract males for mating. the percent composition of eicosene (280 g/mol), a compound similar to the japanese beetle mating pheromone, is 85.63% c and 14.37% h. determine its molecular formula.

Question

Biology

Vanessa Wong

11 June, 07:38

Pheromones are chemical substances secreted by members of a species to stimulate a response in other individuals of the same species. for example, certain pheromones are secreted by females of a species to attract males for mating. the percent composition of eicosene (280 g/mol), a compound similar to the japanese beetle mating pheromone, is 85.63% c and 14.37% h. determine its molecular formula.

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Triston Harding · Answer 1

The percent composition of eicosene (280 g/mol) is 85.63% c and 14.37% h.

The number of C atoms would be:

percentage * eicosene weight / carbon weight

85.63% * 280g/mol / 12g/mol = 19.98 = 20

The number of H atoms would be:

percentage * eicosene weight / carbon weight

14.37% * 280g/mol / 1g/mol = 40.23 = 40

The compound made of 20 carbon and 40 hydrogen, so it should be C20H40