Numerade

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Consider the molecule (or ion): CH2 CH2 Part 1 of 3 What is the hybridization of each carbon atom? Part 2 of 3 What is the total number of bonds in CH2 CH2 ? Part 3 of 3 What is the total number of bonds in. CH2 CH2 ?

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15. (6 pts) Draw the major product(s) for the following reactions. If no reaction occurs write NR. For each reaction specify the type of mechanism: $S_N1$, $S_N2$, $E1$, $E2$, or acid-base (AB). If more than one type of mechanism can occur, specify this. (Assume room temp if not specifically stated.) (a) Mechanism(s): ``` Cl | --C-- / \ | | ``` $CH_3CH_2OH$ (b) Mechanism(s): ``` OH | --C-- / \ | | ``` $H_2SO_4$ (aq), $100^\circ C$ (c) Mechanism(s): $CH_3O-$ ``` O || --S-- || O ``` ``` -- | --CH_3 | -- ``` NaOH

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A clear sheet of polaroid is placed on top of a similar sheet so that their polarizing axes make an angle of 60 with each other. The ratio of the intensity of emerging light to the incident unpolarized light is: 1:8 1:2 1:4 3:4 3:8

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Describe how to make a 100 mL of a 0.1 M acetate buffer with pH=4.5

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How many frams are in 14.2 mL of ethanol if the density of ethanol is 0.789 g/mL?

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The desired feature of a product to be designed is that it should not give way before breaking. When you examine the material selection card given below, which material group would you prefer? (8p) 7. Based on the graph given below, specify the metal alloys that correspond to the desired properties of the metal alloy class (20 p).

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The problem with focusing on isolated facts, such as definitions of key terms, is that: Group of answer choices You may not cover all of the course material You may get the definition incorrect You may not be able to apply the concept You may neglect reading all the course material

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If 680 l/min of water flow in a 150 mm pipeline having a roughness (e) of 0.75 mm, and if similar relative roughness (e/D) having roughness (e) of 0.375 mm exits in another 75 mm pipe, what flowrate of crude oil must take place in the second pipe for the friction factors of the two pipes to be same? Both flows are turbulent. (Water: Kin. Visc. = $1.003 \times 10^{-6}$ m$^2$/s; Oil: Specific gravity = 0.8; viscosity = $4.86 \times 10^{-3}$ Pa.s) (25 points)

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If you try to sell a life-insurance by scaring people about the corona virus so that they would buy it out of fear, you are Persuading them Bamboozling them Manipulating them Convincing them

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Section 2 4. 5 kg of gas is compressed from an initial volume of 4 m³ to a final volume of 1.5 m³ under constant pressure of 100 kPa. What is the boundary work done during this process? 5. A 5 m³ tank containing 5kg of an unknown ideal gas at 500 kPa is connected through a valve to another tank containing 10 kg of the same gas at 200 kPa. The two tanks have thermal equilibrium with the ambient environment. After the valve has been opened, the tanks again reach thermal equilibrium with their ambient environment. What is the a) total volume, bj total mass, and c) pressure of the gas in the two tanks? 6. An insulated piston-cylinder device contains 4.5 m³ of water with a quality equal to 0.5 at a constant pressure of 300 kPa. Water is stirred by a paddle wheel while electrical current flows through a resistor placed in the water. During this constant-pressure process, the paddle wheel work amounted to 1000 kJ and electrical work from the resistor amounted to 19000 kJ. What is the temperature of the water in its final state? Show the process on a P-v diagram with respect to saturation lines.

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