Numerade

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Show the reaction for the reaction of methyl acetate. Draw the structures NEATLY by hand.

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Mistakes can happen! You stain an endospore specimen with malachite green for 10 minutes, but the steam bath is not turned on. Would you be more likely to get a false positive result or a false negative result? Explain.

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The Mental Noise Model tells us that: Outrage tends to distort our perception of hazards Stress can reduce our ability to process information Negative information receives significantly greater weight Certain factors can impact how we perceive risk

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Suppose you have an atom composed of 13 protons, 14 neutrons, and 13 electrons. What is the approximate mass of this atom? 26 26.98 40 27

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QUESTION 2: RESPONSES OF VOLUME AND PRESSURE TO MEASUREABLE PROPERTIES A) The speed of sound in a medium can be evaluated from the square root of isentropic change of pressure with change of density. For the speed of sound in commercial copper at 25OC about 4800 m/s, estimate the adiabatic compressibility of copper at 25OC [10 marks] [Data: Density of commercial copper @ 25OC = 8300 kg/m3, CP = 0.42 kg/kJ K] B) Mercury undergoes a change of state from 1 bar and 100OC to 1000 bars and 0OC. Calculate the change in molar enthalpy of mercury in the process [10 marks] Data: T/OC P/bar \beta /OC-1 v/cm3 mol-1 CP/J mol-1 OC-1 0 1 181 x 10-6 14.72 28.0 0 1000 174 x 10-6 14.67 28.0 100 1 - - 27.5 C) Liquid ethanol is continuous isothermally pumped from 20OC and 1 bar to 1000 bars. Calculate the minimum required: i) ii) Heat that must be removed to maintain the temperature constant [10 marks] Pump work [10 marks] [Data: Liquid ethanol properties @ 20OC and 1 bar. v = 58.40 cm3/mol; \beta = 11.2 x 10-4/K; KT = 109 x 10-6/bar]

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If you are somewhat interested in a specific vehicle, you should provide a small deposit so the car seller will hold the vehicle for you True or False True False

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Hobbes thinks that if nearly everyone follows the rules of morality, then what will follow? Society will collapse Nobody can get what they want Life will be nasty, brutish, and short

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Part A: 1. Name and draw the products of each reaction. (a) Butan-2-ol + hydrobromic acid ? (b) Pentan-2-ol (c) N-propyl methanamide + water (d) 3-methyl hept-2-ene + hydrobromic acid ? (e) 2-ethoxy-2-iodo butanoic acid + ethanol ? Part B: 1. Complete the following reaction by chemical structures (Line, structural or condensed is acceptable) Example: ethene 2-ethyl butanol + [O] ? (g) Pentan-2-ol + [O] ? (h) ethyl 3-amino-butanoate + H?O ? Part C: 1. Complete the following reaction by chemical structures (Line, structural or condensed is acceptable) (i) 3-fluoro pent-2-one + [H] ? (j) Butanoic acid + [H] ?

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Please give the correct answer for both the questions 7.[-/1.53 Points] DETAILS MENDSTAT15 1.3.004. Consider the following data set. 4.2 6.0 3.9 4.5 3.4 4.6 5.0 5.8 0+ 3.0 4.6 4.9 4.6 3.8 4.9 5.3 4.6 5.1 4.7 7.3 3.4 3.8 3.7 6.0 2.9 6.5 3.3 4.5 3.5 4.5 6.0 5.7 2.5 7.0 4.8 5.0 5.6 4.8 5.7 4.9 5.5 5.0 A stem and leaf plot of the data is given below. stem leaf 5 9 034447889 0 22555 6 666 77 8 8 8 9 9 9 000133446778 0000556 703 Use the stem and leaf plot to find the smallest observation. Submit Answer 8.[-/1.53 Points] DETAILS MENDSTAT15 1.3.005. Consider the following data set. 4.0 3.0 4.6 5.1 4.6 3.8 4.9 5.3 4.8 5.3 4.7 7.1 3.6 4.0 3.9 6.2 2.7 6.5 3.4 4.5 4.5 6.0 5.0 5.0 5.8 4.6 5.7 4.9 5.0 A stem and leaf plot of the data is given below. stem leaf 7 7 01444789 0 0 2 2 4 5 5 5 6 6 6 7 7 8 8 9 9 000013334467788 0 0 2 5 7 8 01 Find the eighth and ninth largest observations. (Enter your answers as a comma-separated list.)

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QUESTION 2 Recommend? SMARK'S (ii) that must be added by the pump 15 MARKS Figure 1. A pumping system QUESTION 3 a Explain how cavitation damages hydraulic turbines. How is this detected when the turbine runs? List any four (4) ways of increasing the available NPSH to avoid cavitation. 19 MARKS b When a test was carried out on a pump, it was found that for a pump total head of 36m at a discharge of 0.05 m/s, cavitation began when the sum of the static pressure and velocity head at the inlet was reduced to 3.5 m. The atmospheric pressure was 750 mmHg and the vapor pressure of water was 1.8 kPa. If the pump is to operate at a location where the atmospheric pressure is 620 mmHg and the temperature is reduced so that the vapor pressure of water is 830 Pa, what is the value of the cavitation parameter when the pump develops the same head and discharge? Is it necessary to reduce the height of the pump? If so, by how much? 15 MARKS

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brenda s.