A pyrex cylinder, 32 cm tall and about 2 cm in diameter, will be filled with boiling water and kept on the hot plate for 4 minutes. I will rapidly pour out the water and then turn the cylinder upside-down, Immersing the top 1 cm below the surface in a large pan (22 x 34 cm) of room temperature water. We wait 15 minutes. Predict what will be the level of the water inside the cylinder, to the nearest centimeter.
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- Polycarbonate, PC, is used for aircraft canopies. A batch of this polymer was found to fail prematurely when impacted by a 4 pound bird during qualification studies. You suspect that the problem is due to a molecular weight difference for this particular batch of polymer compared to previous batches. You decide to perform dilute solution viscosity studies to determine the Mol.wt. Assume density is 1.2g/cm3 What solvent would you use? Justify your answer Please answer very soon will give rating surelyTorque can be calculated by multiplying the force (NNN) applied at 90∘90∘ to the lever arm at a distance (mm) from the pivot point (point of rotation), the compound SI unit for the torque is N⋅mN⋅m. If the force (at 90∘90∘ to the lever arm) applied is 15 N15 N and it is applied at 2.0 m2.0 m from the pivot point (point of rotation), what is the torque on the lever? Express the torque with the appropriate units.Element X has an enthalpy of fusion (ΔfusH°) of 59.2 kJ mol-1 at its melting point (Tm = 684°C). Calculate ΔSsys for the freezing process,X(l) ⇌ X(s)at 1 bar and 684°C. Express your answer in units of J mol-1 K-1 to 3 significant figures.
- A sample of blood plasma occupies 0.550 dm3 at 0 ocand 1.03 bar, and is compressed isothermally by 0.57 perWhat will be the height of a column of chloroform (density = 1.49 x 103 kg/m3) that will be supported by a pressure of 2.00 x 105 N/m2? 1 N = 1 kg - m/s2. The acceleration due to gravity is 9.807 m/s2.An open vessel containing liquid water stands in a sealed room measuring 5.0m wide x 4.0m long x 3m high. The temperature of the room is 320K and, over time, some of the liquid water evaporates. Eventually, the liquid water level in the vessel stops changing. a) How many grams of water will be in the humid air within the sealed room? b)A contact lens cleaning system on the market uses an aqueous hydrogen peroxide solution to disinfect the contact lenses. In a few hours, the hydrogen peroxide decomposes to liquid water and oxygen gas in a catalyzed reaction. The vessel in which the reaction occurs has a hole in the top. Use chemical potential to explain how the equilibrium concentration of hydrogen peroxide would be affected if the hole was not present.
- Penicillin is hydrolyzed and thereby rendered inactive by beta-lactamase, an enzyme present in some penicillin-resistant bacteria. The mass of this enzyme is 30.0 kDa. The amount of penicillin hydrolyzed in 1 minute in a 1 mL solution containing 3 x 10-3 g of the enzyme was measured as a function of the concentration of penicillin. Calculate Km, Vmax , and kcat from the following data: (Clearly show where 1/Vmax and -1/Km are; clearly explain how to obtain your kcat value). [S] (mM) vo (mM s-1) 0.14 0.138 0.28 0.234 0.55 0.333 0.77 0.388 1.52 0.491The annual production rate of CH3Cl is 0.3 Tg/y and has an average mixing ratio of 650 pptv What is its average residence time in the atmosphere?Table 1 below shows the data for the filtration of fruit juice to produce clarified fruit juice at 298.2 K. Table 1: Total volume of filtrate collected at certain time V * 103 (m3) t (s) 0.5 17.3 1.0 41.3 1.5 72.0 2.0 108.3 2.5 152.0 3.0 201.7 The filtration process was conducted at a constant pressure of 46.2 kN/m2. The area of the plate-and-frame the press was 0.0439 m2, and the pulp concentration was 23.47 kg solid/m3 filtrate. a) Convert the data in Table 1 into a graph. You can either use Excel or graph paper. Your graph should be self-explanatory. b) Using the graph in (a), estimate the specific cake resistance and the resistance of the filter medium to filtrate flow.
- Calculate the flow rate of benzene that can be heated from 25.0°C to 80.0°C by heat exchange with 100 kg/hr of saturated steam that condenses at 100°C. Assume that the average specific heat capacity of benzene from 25°C to 80.0°C is 142.94 J/mol*K.A shop-vac is capable of pulling in air at a rate of 210 ft^3/min. What is the rate of the vacuum’s air flow in L/s?1.Calculate the mass of the liquids collected in surface tension determination. 2. Calculate the average drop mass by dividing the mass of liquid collected with the number of drops. 3. Calculate the drop volume using Eqn 3b-4.The literature values of the density of water and ethanol can be seen in Table 3b-5. Assume that the temperature is 30°C. 4. Before computing for the surface tension, determine the correction factor (f) at r/v1/3 , where r is the outer radius of the burette tip, using Table 3b-4. To locate f in the table, use the following example as guide: If r/v1/3 = 0.32, then find what values in the row and column headings will make a sum of 0.32. In this case, 0.3 (row) plus 0.02 (column) equals 0.32. Thus, f = 0.72313. 5. Finally, calculate the surface tension using Eqn 3b-3: