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Base your answers to questions 63 thrHougHh 65HonHtheHinfoHrmation below and on your knowledge There are several isomers of C HH . The formulas and boiling points for two of th
Boiling Point49a.t71 atm (°C) 68.7
6 14 isomers are given in the table below.
HHCHHH
Sample Regents Questions
Isomer 2 H FoCrmulCa C C 1
H
HHH H H HHHCH H
H C C C CH C C H HHHHHH
63 Identify the homologous series to which these isomers belong. [1]
H
64 Write the empirical formula for isomer 1. [1]
HHCHHH
65 Explain, in terms of intermolecular forces, why isomer 2 boils at a lower temperatu than isomer 1. [1]
June 2013 #64
2 HCCCCH 49.7 HHCHHH
H
Answer
C H 63 Identify the homologous series to which these isomers belong. [1] 37
64 Write the empirical formula for isomer 1. [1]
Explanation: There are 6 carbons and 14 hydrogens. So the molecular formula is: C6H14.
65 Explain, in terms of intermolecular forces, why isomer 2 boils at a lower temperat
To find the empirical formula, we must reduce this equation. The highest number
than isomer 1. [1]
we can divide both subscripts by is 2. So we divide both subscripts by 2. The empirical formula is: C3H7
P.S./Chem.–June ’13 [11]
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