January 2020 NY Regents Chemistry Exam
35 A measured value for the atomic radius of platinum atoms was determined to be 143 picometers. Based on Table S, what is the percent error of this measured value? (1) 0.10%
(2) 9.1%
(3) 10.%
(4) 13%
Solution: The formula for % error is (measured value – accepted value)/accepted value*100.
Table S gives the radius of platinum atoms which is 130 pm (accepted value)
% error = ((143pm-130 pm)/130 pm) * 100
Answer: 3
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