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Calculate the absolute uncertainty for the following: (1.15 ±0.24 ng)/(2.20 ±0.35 L)
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- The percent relative uncertainty of a buret reading of 24.35 ± 0.02 is: The choices are : A. 0.0008% mL B. 0.08% mL C. 0.02% mL D. 0.082% mL E. 0.00082% mLWhat is the level of uncertainty in the measurement 0.00035 mg?For the numbers 116.0, 97.9, 114.2, 106.8 and 108.3, use the Q-test, decide whether the number 97.9 should be discarded.
- 1. The tolerance of a Class A 50 mL transfer pipet is ±0.05 mL. A student uses an uncalibrated Class A transfer pipet to deliver a total of 300 mL of solution. What is the uncertainty in the delivered 300 mL? ± ______________ mL 2. Next, the student calibrates the pipet. The calibrated pipet delivers a mean volume of 49.994 mL with an uncertainty of ±0.005 mL. The student then uses the calibrated 50 mL pipet to deliver a total of 199.976 mL of solution. What is the uncertainty in the delivered 199.976 mL? ± _______________ mLIn the UV assay of paracetamol you are required to weigh tablet powder “…containing 0.150 g of Paracetamol…”. If the stated content of paracetamol per tablet is 500 mg and the weight of 20 tablets is 11.223 g then the amount of paracetamol tablet powder to be weighed isThe tolerance of a Class A 50 mL transfer pipet is ±0.05 mL. A student uses an uncalibrated Class A transfer pipet to deliver a total of 200 mL of solution. What is the uncertainty in the delivered 200 mL?
- What is the absolute uncertainty of the density a solution with a mass of 84.7 ± 0.2 g and a volume of 114.0 ± 0.4 mL?1. Assuming the the uncertainty of +/- 1 in the last digit , what is the relative uncertainty in ppt in the following numbers. A. 6.02 × 10^23 B. 500 C. 40 D. 10.01 E. 9.993. A student weighed an unknown mass directly on an electronic balance of intermediate sensitivity, and got a result of 28.774 g. The student then realized a mistake had been made, and weighed the same unknown by difference on the same balance with the following results:Mass of beaker plus unknown = 59.121 g.Mass of empty beaker = 30.346 g.When the sensitivity of the balance is taken into account, the two values obtained for the unknown mass are considered to be:a. Differentb. The SameExplain your answer.
- Student B determined the density of water to be 1.04 ± 0.05 g/mL. Consider Students A results. Which student was more accurate? Which student was more precise? (Student A got the following densities of water; 1.09 g/mL, 1.14 g/mL, and 1.15 g/mL with an average of 1.127 g/mL and a standard deviation of 0.026 g/mL)4. A student measures the density of an Unknown liquid 3times and obtains an average density of 0.705g/mL with a Standard Deviation of 0.352g/mL. 1.What can you say.If anything about the Precision of the measurements? 2.What can you say if anything about the Accuracy of the average density?Hi! I m working on a lab right now. I have three measurements, 1.057 .9442 .9629 and a mean measurement of .9880. Im supposed to find the deviation and I understand that i just find the difference, but can a deviation be negative?