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- In a survey of 1000 large corporations, 250 said that, given a choice between a job candidate who smokes and an equally qualified nonsmoker, the nonsmoker would get the job (USA Today).(a) Let p represent the proportion of all corporations preferring a nonsmoking candidate. Find a point estimate for p.(b) Find a 0.95 confidence interval for p.(c) As a news writer, how would you report the survey results regarding the proportion of corporations that hire the equally qualified nonsmoker? What is the margin of error based on a 95% confidence interval?(d) By using the data provided below, calculate the PillingBedworth ratio for the nickel (Ni) – nickel oxide (NiO) system and determine whether NiO is protective against corrosion. Atomic mass of nickel = 58.7 g.mol-1 Density of nickel = 8.91 Mg.m-3 Molecular mass of nickel oxide = 74.7 g.mol-1 Density of nickel oxide = 6.67 Mg.m-3 (e) A stainless steel pressure vessel that has fracture toughness, K1C, of 197 MN.m-3/2 is going to be exposed to a stress of 398 MN.m-2 . By using this information explain how designers can determine the thickness of the vessel so that catastrophic failure can be avoided.A volumetric calcium analysis on triplicate samples of the blood serum of a patient believed to be suffering from a hyperparathyroid condition produced the following data: mmol Ca/L = 3.55, 3.65, 3.14. What is the 95% confidence interval for the mean of the data, assuming(a) No prior information about the precision of the analysis?(b) s → σ = 0.056 mmol Ca/L?
- Which of the following statements are correct? (Sdect all that apply.) O a -a - 1 '() O z(a + b) = O None of the AboveSelect which of the following products would be made by the chemical transformation indicated below: H₂ Lindlar's cat.5.) The blood velocity in aorta can be measured directly using ultrasound. The graph below shows the blood velocity versus time for a single heartbeat. Which statement best describes the graph? (a) The acceleration of the blood is greatest in magnitude at about 0.25 s; (b) the acceleration of the blood is greatest in magnitude at about 0.10 s; (c) the blood flow changes direction at about 0.25 s; (d) the speed of blood flow begins to decrease at about 0.10 s. Blood velocity (m/s) 1.0 0.8 0.6 0.4 0.2 0.25 0.50 Time (s) 0.75 1.00
- (а) 2103 (ад) + 10 Cu" (aq) + 10 н"(ад) — 10 Cu"** (ag) + la (ag) + 5 H-0() O P() | Cut (ag), Cu?* (аq) || IOз (ад), н* (аq), I (ag) | Pt(s) O Pel(o) | Cu* (ag), IOз (ад), н* (аg) || Cu?* (ag), I, (ag) | Pt(8) O Pt(s) | IO3 (ag), H† (aq), I2 (aq) || Cu* (aq), Cu²+ (aq) | Pt(s) О Pe(6) | Cu?* (ag), I3(ag) || Cu" (аg), 10; (аg), н* (ад) | Pt() (b) Zn(s) + 2 Ag* (aq) = Zn²+ (aq) + 2 Ag(s) O Zn(s) | Zn²+ Zn(s) | Ag* (ag) || Zn²+ (aq) | Ag(s) O Ag(s) | Ag* (aq) || Zn²+ (ag) | Zn(s) O Ag(s) | Zn²+ (aq) || Ag* (aq) | Zn(s) (aq) || Ag*(aq) | Ag(s) (с) НаО(ад) + 2 H* (аq) + 2 е — 2 H:0() E° = 1.78 V Оэ (9) + 2 H* (ад) + 2 е НаОz(аg) Е 3 0.68 V O Pt(s) | O2(g) | H2O2 (aq), H* (aq) || H2O2 (ag), H* (ag) | Pt(s) O Pt(s) | H2O2 (ag), H* (ag) || 02(9) | H2O2 (aq), H* (aq) | Pt(s) O Pt(s) | H2O2 (aq) | O2(9) || H† (aq) | Pt(s) O Pt(s) | H2O2(aq) | Pt(s) (d) Mn'* (aq) +2 е — Mn(s) Е 3D - 1.18 V Fe+ (aq) + 3 e → Fe(s) Е 3D -0.036V O Mn(s) | Mn²+ (ag) || Fe*+ (aq) | Fe(s) O Fe(8) | Mn²+ (aq) || Fe* (aq)…College of Teacher Bachelor of Secondary Education *promoting pedagogical excellence elor of Sec omoting pedage RIN ht: (a) (b) Br. C. CH3 b1. HNO3, H2SO4 2. Fe, H30*r H2/Pd s / oD Br NO2 (c) KMN04 7 (d) Cl CH3CH2CH2CI AICI3 H20 7. OCH3 4. Predict the major product(s) of the following reactions: OM (a) CI (b) CH CH CH3CH2C! AICI3 CH3CH2COCI AICI3 (c) CO2H HNO3 (d) N(CH2CH3)2 H2SO4 SO, H2SO4 ASITY! 9 a alt ← Z If you live to be approximately 83 years old, how many hours long was your life? Assume a year is exactly 365 days. @ 2 W S →> X #m 3 e d C с $ 4 r f % 5 V t g Oll A 6 DELL b y h & 7 O n u j * 00 O m i k ( 9 < 4 O alt ) O 1 P ◆ ctrl : - ; { [ ? 1 +11 = I } bac 1
- 2b) What is the primary consideration?Q3)a) Discuss the any two applications of Beer’s law with suitable justification. (b) In an analytical laboratory a chemical compound namely Paracetamol (151.163 g/mol) is determined in a sample. A sample weighing 0.0295 g was dissolved in a solvent and diluted the solution to 1 L. The solution has λ max at 243 nm (ε=2.6×104 cm-1 mol-1 L). The solution exhibits an absorbance of 0.638 in a 2 cm cell. Calculate the percentage paracetamol in the sample. (c) Analyze any two causes of non-linearity of curve in the Beer’s law.professor Scimemi has accepted you as a Master’s student and you are involved in a project that studies the cellular basis of neuropsychiatric diseases. For your electrophysiology recordings you have to make a recording solution containing (in mM): 119 NaCl, 2.5 KCl, 2.5 CaCl2, 1 MgCl2, 26.2 NaHCO3, 1 NaH2PO4, 22 glucose. You need 800 ml of it. How much KCl do you need to weigh out? Hint: we only care about KCl here. (MW KCl is 74.55 g/mol