For each of the mathematical expressions given: 1. Tell the correct number of significant figures for the answer. 2. Evaluate the mathematical expression using correct significant figures in the result. 29.3 (284 x 4.2) 15.2 2.75+ 16.67 3.984 x 2.16 0.0714.36 2.17+ 4.32 + 401.278 + 21.826 17.1 +0.77 Number of Significant Figures Result

For each of the mathematical expressions given: 1. Tell the correct number of significant figures for the answer. 2. Evaluate the mathematical expression using correct significant figures in the result. 29.3 (284 x 4.2) 15.2 2.75+ 16.67 3.984 x 2.16 0.0714.36 2.17+ 4.32 + 401.278 + 21.826 17.1 +0.77 Number of Significant Figures Result

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 27RPS: To determine the average mass of a popcorn kernel, you collect the following data: Plot the data...

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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.
Find the difference between the value of x2 and the sum of x1 plus x3.; let x4 be equivalent to the sum of x1 and x3 and let x5 be the difference between x2 and x5. This calculation scheme is shown below. Make notes about any similarities or differences between the values in your notes. x4 = x1 + x3 x5 = x2 – x4 Data Analyis This section will include all data collected during the lab. Thermochemical Data Tinitial (°C) Tfinal (°C) ΔT (°C) moles NaOH qreaction (kJ) ΔHrxn Reaction 1 25.0 30.3 +5.3 0.025 -1.11 -44.4 Reaction 2 25.0 37.0 +12.0 0.025 -2.51 -100.4 Reaction 3 25.0 31.7 +6.7 0.025 -1.40 -56.1 Reaction 1: NaOH(s) → Na+(aq) + OH-(aq) + x1 kJ 1g /39.977g/mol = 0.025 moles Moles NaOH = 0.025 qsolution = (4.184 J/g °C) (50.0g) (30.3°C -25.0°C) = -1108.76 J/ 1000 qreaction (kJ) = -1.11 kJ ΔH = -1.11 kJ/ 0.025 moles ΔHrxn = -44.4 kJ/mol…
7) (3.4617x 102) (5.61 x 10-4) (9.87x 105) (3.1) (1.171 x 104) = 8) (3.52164 x 102)(3.1741 x 105) (8.22 x 107) (4.65217 x 10-3) (9.711 x 104) 9) (1.8741 x 1011) (5.6 x 104) (2.173 x 108) || 10) (1.745 X 100) (9.51 x 107) = (16.21) (9.346 x 10-10)
What is the uncertainty in the measured value 12.37040 after it is rounded to the following number of significant figures? The uncertainty of 6 is? The uncertainty of 4 is? The uncertainty of 3 is?
For the following calculations and questions, use all applicable rules of sig figs and rounding to determine the answers: 0.53 x 12.3 x 1.321 = 15.1 + 20. + 130 = How many sig figs in the number 0.00040 How many sig figs in the number 500. What is the exact answer to 8.00/4.00 =
Make the following calculation and report your answer to the correct number of significant figures running to the result, if necessary. (4.566+ 6.2192)/ 88.92
I need the answer as soon as possible
5) significant figures should be retained in the result of the following calculation: (354.0 + 21.01) x 107 (0.012 + 2.30) x 10² 1 O O
Carry out the following mathematical operations and answer the questions that follow. 33.916 x 95.7 The result of this calculation will have significant figure(s) and should be reported as 33.916 +95.7 The result of this calculation will have decimal place(s) and should be reported as
Perform the following calculation and input the answer expressed to the correct number of significant figures. (264.3−258) ÷ 65=_____ I think the answer is 0.09692308 so significant figure is 7?
3. Give the result of the following calculation to the correct number of significant figures. Express your answer in standard scientific notation: (13.5467)(9.81)(14.30)/(33.102 – 12.671)(1.548 X 10-5)/(5.67 X 108)