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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Suppose the absorbance of a 0.084 M solution of nickel(II) nitrate in water is measured to be 0.305 in a cuvette with a path length of 1.00 cm. If the solution is then diluted by a factor of 3, what do you expect the absorbance of the diluted solution to be, when measured in the same 1.00-cm cuvette? Round your answer to the correct number of significant figures
A stock solution of 0.225 +/- 0.003 M NaNO2 was transferred to a 100 mL volumetric flask (class A) and diluted to the mark. If 7 mL of the stock solution was transferred using one 5-mL and two 1-mL volumetric pipettes, what is the new concentration of the solution and the uncertainty?
Il 42.7 mL of 0.202 M HCl solution is needed to neutralize a solution of Ca(OH)2, how many grams of Ca(OH)2 must be in the solution? Express the mass in grams to three significant digits. IVD ΑΣΦ m = m= ? If 45.3 mL of 0.114 M HCl solution is needed to neutralize a solution of KOH, how many grams of KOH must be present in the solution? 15. ΑΣΦ g ESMIC ? g
/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…
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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.
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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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