Answer
See the answer below.
Work Step by Step
At lightspeed:
$2.998\times10^8\ m/s=7.8\times10^{10}\ m\div t$
$t=260\ s$
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 6 The Structure of Atoms - Study Questions - Page 247d: 65
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