Anthracene, a hydrocarbon obtained from coal, has an empericalformula of C7H5. To find its molecularformula, you dissolve 0.500g in 30.0g of benzene. The boilingpoint of pure benzene is 80.10 o C, whereas the solutionhas a boiling point of 80.34 oC . What is the molecularformula of anthracene?
usagirl007A
Answered question
2021-01-31
Answer & Explanation
yunitsiL
Skilled2021-02-01Added 108 answers
?Tb= Kbm; Kb= 2.53oC/m for benzene m =?Tb/Kb
moles of anthracene = (0.095 moles/1000g benzene)(30.0g benzene)
MW anthracene =
whole number to multiply subscripts in empirical formula =175.44/empirical formula weight anthracene =
Molecular formula of anthracene is C14H10
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