Exam 1A - Chem103F06 Exam 1A Oct 5 2006 Name_Section FOR...

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Chem103F06 Exam 1A Oct. 5, 2006 Name_______________________________________Section_________________________ FOR FULL CREDIT SHOW WORK ON ALL PROBLEMS I(9 pts)Place the correct answer in the space at the left. 1. A proton is the same as a hydrogen nucleus(the hydrogen ion), the complete nuclidic symbol for a proton is _______________. 2. Two nuclides with the same number of protons are called _____________. 3. All weights in the current periodic table are based on the mass of the specific nuclide _________________. 4. The value of Avogadro’s number is ______________. 5. 1.0 μ m(micrometer) = _______________ m(meter) 6. The three fundamental particles of an atom are __________ 7. ______________, and 8. __________________. 9. Specific compounds are made up of a specific ratio and kind of atoms. This is called the Law of ________________________ II(10 pts) Place the letter corresponding to the correct choice in the space at the left. 1. The common species present to all acids is? A. H 2 B. H + C. OH - D. H 2 O E. HCl 2. How many significant figures are in the calculation: (4.0021 – 0.004) / 2.3750 A) 1 B) 2 C) 3 D) 4 E) 5 3. Lead melts at 327 o C. What is this on the Fahrenheit scale? A) 620.6 B) 600 C) 895 D) 621 E) 547 1
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103F06 Exam 1A Name______________________________________________Section_____________________ 4. A titration was performed to find the concentration an acid and the following data was obtained: Trial Concentration 1 1.25 ± 0.01 2 1.24 ± 0.01 3 1.25 ± 0.01 The actual concentration of acid was found to be 1.100M. The data was: A) both accurate and precise B) accurate but imprecise C) precise but inaccurate D) both inaccurate and imprecise E) none of the above 5. The density of gasoline is 0.7025g/mL. When water is added to gasoline:
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Exam 1A - Chem103F06 Exam 1A Oct 5 2006 Name_Section FOR...

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