Answer
$-0.617\%$
Work Step by Step
$$\text{percentage error}=\mid\frac{\text{average value}-\text{true value}}{\text{true value}}\mid\cdot 100=\mid\frac{128.7^{\ \circ}C-129.5^{\ \circ}C}{129.5^{\ \circ}C}\mid \cdot 100=0.617\%$$
General Chemistry (4th Edition)
by McQuarrie, Donald A.
Published by
University Science Books
ISBN 10:
1891389602
ISBN 13:
978-1-89138-960-3
Chapter 1 Chemistry and the Scientific Method - Problems - Page 35: 25
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