Chemistry 130 Worksheet #1
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1 Chemistry 130 Worksheet #1 1. Fill in the table below with the appropriate information. Specifically, report the number of significant figures for each value and also provide the absolute uncertainty. a. Absolute Uncertainty ml cm 500 g b. Proper Form of Scientific Notation 96400x What is the answer to the equation shown below rounded to the proper number of significant figures? Place a box around your final answer What is the answer to the equation shown below rounded to the proper number of significant figures? Place a box around your final answer What is the answer to the equation shown below rounded to the proper number of significant figures? Put your final answer in the proper form of scientific notation and place a box around your final answer x x10 6
2 Chemistry 130 Worksheet #1 B 1. What is the answer to the equation shown below rounded to the proper number of significant figures? Place a box around your final answer What is the answer to the equation shown below rounded to the proper number of significant figures? Place a box around your final answer What is the answer to the equation shown below rounded to the proper number of significant figures? Put your final answer in the proper form of scientific notation and place a box around your final answer x x Fill in the table below with the appropriate information. Specifically, report the number of significant figures for each value and also provide the absolute uncertainty. a. Absolute Uncertainty kg 5500 s 109 m b. Proper Form of Scientific Notation x10 2
3 Chemistry 130 Fall 2017 Worksheet #2 (You must use one line dimensional analysis as we did in class to receive full credit) 1. Convert 34.2 m to nanometers. Show all work, put your answer in scientific 2. Convert 34.2 micrometers to meters. Show all work, put your answer in scientific 3. Convert 2.21x10-2 Gm 3 to nanoliters. Show all work, put your answer in scientific 4. Convert 2122 kl to cubic micrometers. Show all work, put your answer in scientific
4 5. A meteorite is found to have a density of 18.4 g/ml. What is the volume (m 3 ) of a 6.24 µg sample of the meteorite? Show all work, put your answer in scientific 6. A meteorite is found to have a density of g/ml. What is the volume (gallons) of a 4.25 ng sample of the meteorite? Show all work, put your answer in scientific notation, and place a box around your final answer. 7. If a quarter has a thickness of 1.84 mm, what is the value in dollars of a stack of quarters mm high? Show all work and place a box around your final answer. 8. If a dime has a thickness of 1.05 mm, what is the value in dollars of a stack of dimes mm high? Show all work and place a box around your final answer.
5 9. A typical fl oz. can of Pepsi contains 38.0 mg of caffeine. How many micrograms of caffeine are contained in a 12 m 3 sample of Pepsi? 10. In an experiment, I determined the mass of sulfur in a sample to be g. If the volume of the sample was ml what is the density I calculated for the sample of sulfur? If the true density of sulfur is g/ml, determine the absolute error (a.e.) and the percent relative error (% r.e.) of my experimentally determined density. You must show all your work and use a in any intermediate values. For all of the calculations, show unrounded and rounded answers, with a box around your rounded values. (7 points) Density a.e. = A-X % r.e. = a.e. 100% A A = True Value X = My Value a.e. % r.e.
6 1 m = yards 1 inch = 2.54 centimeters (exact) 12 inches = 1 foot (exact) 1 gallon = liters 1 mile = kilometers 1 pound = grams 1 ton = 2000 pounds (exact) 1 fl oz. = ml 4 quarters = 1 dollar (exact) 10 dimes = 1 dollar (exact) 1 Gm = 1x10 9 m (exact)
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