212 Fall 2003 Exam1 - Name_____________________ Avogadros #...

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Unformatted text preview: Name_____________________ Avogadros # = 6.022 x 10 23 Chemistry 212 Fall 2003 Exam I Multiple Choice: (1 point each) Clearly mark answers on the scantron, also circle correct answer and show work on exam for full credit. 1. A titration was performed to find the concentration of hydrochloric acid with the following results: Trial Molarity 1 1.25 0.01 2 1.24 0.01 3 1.26 0.01 The actual concentration of HCl was determined to be 1.000 M; the results of the titration are: A) both accurate and precise. B) accurate but imprecise. C) precise but inaccurate. D) both inaccurate and imprecise. E) accuracy and precision are impossible to determine with the available information. 2. A scientist obtains the number 1250.37986 on a calculator. If this number actually has four (4) significant figures, how should it be written? A) 1251 B) 1250.3799 C) 1250.4 D) 1.250 10 3 E) 1.250 10 3 3. Convert 974036 mm to km....
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212 Fall 2003 Exam1 - Name_____________________ Avogadros #...

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