tory Bookmarks Window Help rk 6 02/25/18 Question (1 point) a See page 292 1st a

Question

tory Bookmarks Window Help rk 6 02/25/18 Question (1 point) a See page 292 1st attempt l See Periodic Table Q See Hint 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 85.63x C and 14.37% H. Determine its molecular formula 09.20 0 oF 20 QUESTIONS COMPLETED 4 5

Explanation / Answer

we have

C = 85.63 %

H= 14.37 %

thus

C = 85.63 / 12 = 7.14 / 7.14 = 1

H= 14.37 / 1.0 = 14.37 / 7.14 = 2

thus

there are 1 atom of C , 2 atoms of H

therefore

empirical formula of compound is = CH2

molar mass of compound = 280 g/mol

and

emipiracal mass of compound = 12 + ( 2 x 1 ) = 14 g/mol

thus

n = molar mass / empirical mass = 280 / 14 = 20

and

molecular fomula of compound = (CH2)n = (CH2)20 = C20H40

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.