Question 65 pts 1DetailsSuppose that a shipment of 18 calculators is received by a school. Suppose also that 37% of all calculatorshave dead batteries.(a) Fill in the values below.n =p =1-p=(b) What is the mean (or expected value) of the number of calculators received by the school that havedead batteries.Do not round.(c) What is the standard deviation of the number of calculators received by the school that have deadbatteries.Round to 2 decimal places.

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Answered: Question 6 5 pts 1 Details Suppose that…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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/1wdGaF3fc41TY-3NU4JhvIQJLK2kFekLX/edit minutes ago IUA 三 ==,E 三E|X 20 2 | E 3 LI 4 IT3 E OI I 7 + EXPERIMENT Percent vield Due after completing the lab. Answer in the space provided. 1. A student reacted 0.500 g of Pb(NO.)2 with 0.750 g of KI according to the reaction, Pb(NO.b (aq) + 2 KI (aq)- → Pbb (s) +2 KNO: (aq) How many moles of Pb(NO.)2 were used? mol of Pb(NO) b) How many moles of KI were used? mol of KI c) How many moles of PbL would form, based on mol of Pbb the moles of Pb(N0) used? d) How many moles of Pbl would form, based on mol of Pbl the moles of KI used? e) Which is the limiting reactant? What is the theoretical yiekd of PbL in grams? 主 g of PbL g) If the student obtained 0.583 grams of PbL product after collecting it by fihration and dry ing it, what was the percent yield of Pbl obtained? 2. Diborane, B H, can be produced by the following reaction: NaBH (aq) H 50 (a) = H (g) = Na SO (aql= BH(B) What is the maximum quantity, in grams, of B H that can be prepared…
What is the absolute uncertainty and relative uncertainty of the molarity of the solution? M = = 0.078376462 = 0.078 M Pb2+
1
Ben ran through the experiment and found the best-fit line listed below for his standard calibration curve of absorbance vs concentration in M. y = 3214.0x + 0.0076 Ben then prepared a solution that had 5.00 mL 0.002 M iron(III) nitrate in 1 M nitric acid, 3.00 mL 0.002 M potassium thiocyanate, and 2.00 mL DI water. If the absorbance for the solution was 0.436, calculate the equilibrium concentration of iron(III) thiocyanate in the solution. Report your answer in mM with three places after the decimal.
(2) In the Analytical Chemistry Laboratory Mr.Yahiya Al Moqbali wanted to prepare KCI solution. He has dissolved 2.634 (+0.002) g of KCI in a 250.00 (±0.08) mL volumetric flask. Calculate the molarity of the solution and express your answer with its absolute uncertainty and give reasonable number of significant figure. [The formula mass of KCI is 74.5513 (±0.001) amu] (Show your Calculation)
If the true density of the urine is 1.023 g/ml what is the technician's percent error? Q3. Consider the hydrated compound potassium ferrioxalate: K3[Fe(C₂O4)3] • 3H₂O (a) Determine the molar mass (g/mol) of the hydrated compound (b) If a student heats 11.39 g of the hydrate and obtains 10.28 grams of product, what would be the experimental mass percent of water in the original compound?
To prepare a solution of KCl, you weigh out 1.5672 (± 0.0003) g and dissolve it in a volumetric flask of 250.00 (±0.50) mL in volume. Express the molarity of the solution and its uncertainty with appropriate number of significant figures. (Formula mass of KCl is 74.551 ± 0.004 g/mol)
To prepare a solution of NaCI, you weigh out 2.634 (to.002) g and dissolve it in a volumetric flask whose volume is 100.00 (±o.08) mL. Express the molarity of the solution, along with its uncertainty, with an appropriate number of digits.
4) ½N2(g) + 02(g)= NO2(g) Kc = 1.04 x 10-9 %3D N2(g) + 202(g) =N204(g) br Kc = 7.42 x 10-18 edmi mcilups Calculate Kc for each of the following. (a) 2NO2(g) = N2(g) + 202(g) (b) N2(g) + 202(g) =N2O4(g) t a0002e muinditiops yiwollol srt tol oolav52 s (S 0 at100 Sn ot beonbonni to l o 2elom 021 bns tH to olom 021 H(8) +P(6) SHI) onrr to el lo 2slom 02 Jom 02.1 11 Smuidiliups ie inseng o1s IH lo 2olom vitsm wod (c) 2NO2(g) = N2O4(g)
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