ultiplication, division, log and antilog) ee number of digits: A. B. C. D. 3.021
ID: 1086297 • Letter: U
Question
ultiplication, division, log and antilog) ee number of digits: A. B. C. D. 3.021 + 8.99 = ? 0.030 2 ÷ (2.114 3 × 10-3) = ? log (2.2 × 10-18) = ? 104.555 3. Calculate concentrations A. Describe how to prepare exactly 100 mL of 1.00 M HCI from 12.1 M HCI reagent B. A 40.0 wt % solution of CsCl (FM 168.37) has a density of 1.43 g/mL. Find the molarity and molality of CsCl in each solution. Determine if the error is systematic or random a. b. C. 4. The temperature in the lab fluctuates every time someone opens the door The balance was not tared before samples were weighed Some of the aqueous samples were left uncapped overnight d. Not all of the solid samples completely dissolved in subsequent trials 5. Propagation of error (addition, subtraction, multiplication, division, log and antilog) 3.4 (±0.2) + 2.6 (±0.1) ? a. b. 3.4 (±0.2) ÷ 2.6 (±0.1) ? c. -log 0.2559(+0.1) Mean and Standard Deviation T test, ftest and q test or g test (formulas and tables will be given) 6. 7.
Explanation / Answer
Systematic errors usually occur due to the measuring instrument either from the data handling of the instrument or the instrument being wrongly used. Random errors are caused by unpredictable and unknown changes in the experiment.
In our case only option (b) is a systematic error due to wrong handling of the instrument by the user as it was not tared and the edroreare reproducible in all the readings.
The same errors are not reproducible in the other options as in case (a) the temperature fluctuations depends on the amount of time the door is opened by anyone, (c) the vaporisation of the solvent from the aqueous solution depends on the vapor pressure of the solvent and solution, (d) the dissolution of solids depend on the amount of solvent or water used or the use of different solvent.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.