Use the expression below to ⚫ calculate its value and report it to the proper number of significant digits (you may need to round your answer). ⚫ calculate the % error (or % relative error or % inherent error) ⚫ calculate the absolute error. (30.078±0.003) - (20.174±0.001) + (9.813±0.005) = Value: % Error: absolute error: ± % (only 1 significant digit) (only 1 significant digit)

Use the expression below to ⚫ calculate its value and report it to the proper number of significant digits (you may need to round your answer). ⚫ calculate the % error (or % relative error or % inherent error) ⚫ calculate the absolute error. (30.078±0.003) - (20.174±0.001) + (9.813±0.005) = Value: % Error: absolute error: ± % (only 1 significant digit) (only 1 significant digit)

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 2RCYU: A student checked the accuracy of two standard top-loading balances by testing them with a standard...

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To determine the average mass of a popcorn kernel, you collect the following data: Plot the data with number of kernels on the x-axis and mass on the y-axis. Draw the best straight line using the points on the graph (or do a least- squares or linear regression analysis using a computer program), and then write the equation for the resulting straight line. What is the slope of the line? What does the slope of the line signify about the mass of a popcorn kernel? What is the mass of 20 popcorn kernels? How many kernels are there in a handful of popcorn with a mass of 20.88 g?
In the pairs of numbers of Problem 2-34, tell whether both members of the pair have the same uncertainty. a. 345,000 and 340,500 b. 2302 and 2320 c. 0.6600 and 0.66 d. 936 and 936,000
When a large or small number is written in standard scientific notation, the number is expressed as the product of a number between 1 and 10, multiplied by the appropriate power of 10. For each of the following numbers, indicate what power of 10 would be appropriate when expressing the numbers in standard scientific notation. a. 84,961,306 b. 0.4870 c. 0.000033812 d. 3,890,406,000,000
Perform the following mathematical operations, and express the result to the correct number of significant figures. a. 2.5263.1+0.4700.623+80.7050.4326 b. (6.404 2.91)/(18.7 - 17.1) c. 6.071 105 - 8.2 106 - 0.521 104 d. (3.8 1012 + 4.0 1013)/(4 1012 + 6.3 10l3) e. 9.5+4.1+2.8+3.1754 (Assume that this operation is taking the average of four numbers. Thus 4 in the denominator is exact.) f. 8.9258.9058.925100 (This type of calculation is done many times in calculating a percentage error. Assume that this example is such a calculation; thus 100 can be considered to be an exact number.)
Many times errors are expressed in terms of percentage. The percent error is die absolute value of the difference of the true value and the experimental value, divided by the true value, and multiplied by 100. Percenterror=truevalue-experimentalvaluetruevalue100 Calculate the percent error for the following measurements. a. The density of an aluminum block determined in an experiment was 2.64 g/cm3. (True value 2.70 g/cm3.) b. The experimental determination of iron in iron ore was 16.48%. (True value 16.12%.) c. A balance measured the mass of a 1.000-g standard as 0.9981 g.
For each of the following numbers, by how many places must the decimal point be moved to express the number in standard scientific notation? In each case, will the exponent be positive, negative, or zero? 55,651 0.000008991 2.04 883,541 0.09814
The accepted value of the melting point of pureaspirin is 135 C. Trying to verify that value, you obtain 134 C, 136C133 C, and 138 C infour separate trials. Your partner finds 138 C,137 C, 138 C, and 138 C. (a) Calculate the average value and percent error for your data and your partner's data. (b) Which of you is more precise? More accurate?
Calculate the value and report to the proper number of significant digits (you may need to round your answer). Calculate the % error (or % relative error or % inherent error) and the absolute error. (20.54+0.02 × 0.254±0.003) / (3.21±0.05) = Value: % Error: 0.1 absolute error: +3 % (only 1 significant digit) (only 1 significant digit)
% error = (experimental value - accepted value) x 100 Accepted value Siver 10.06cm^3 -10.49cm^3 *100 / 10.49 Is this correct ?
The relative error for the following data below is: 39.63, 39.61, 39.05, 39.08 (the true accepted value= 40.00) Please fill in the space with a numerical value with two digits, without any unit and including sign (-) or (+).
1000 Incorrect! But, you can still earn a point by determining the uncertainty value for the correct measurement. 900 883 ± mL 800 SUBMIT UNCERTAINTY 200 100
Please answer.