Answer
$154\ g/mol$
Carbon
Work Step by Step
Molar mass:
$385\ g\div2.50\ mol=154\ g/mol$
Identity of E:
$154=x+35.45\times4$
$x=12.20\ g/mol$
This atomic weight is closest to carbon's.
Chemistry and Chemical Reactivity (9th Edition)
by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.
Published by
Cengage Learning
ISBN 10:
1133949649
ISBN 13:
978-1-13394-964-0
Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95i: 145
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