Answer
C6H12
Work Step by Step
The empirical formula is CH2.
Carbon is 12 g/mol
H is 1 g/mol and there are 2 so 2*1 = 2
This is a total of 14 g/mol.
If the molar mass is 84 then 84/14 = 6 so we multiply the empirical formula by 6
C6H12
Chemistry: The Central Science (13th Edition)
by Brown, Theodore E.; LeMay, H. Eugene; Bursten, Bruce E.; Murphy, Catherine; Woodward, Patrick; Stoltzfus, Matthew E.
Published by
Prentice Hall
ISBN 10:
0321910419
ISBN 13:
978-0-32191-041-7
Chapter 3 - Chemical Reactions and Reaction Stoichiometry - Exercises - Page 115: 3.51a
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