Question 13 What could be the assumption when the MW of the sample does not match calculated molecualr weight from ATb = mkb despite careiui uaid processing? I. The sample is not the compound of interest II. There are some impurities that affeced the boiling temperature III. Low heat is used to achieve boiling condition O I and Il are valid assumptions all are valid assumptions none of the assumption is valid 1 and II are valid assumptions
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- When you determined the MW of a volatile liiquiid using the Erlenmeyer flask with the aluminum foil cap & the pinhole, explain briefly how you were able to obtain: -Mass of the vapor - Volume of the vapor -Pressure of the vapor - temperature of the vapor B) Calculate the MW of iodethane, a volatile liquid, given the following data obtained from the experiment in 12A, given that PV=nRT (R= 0.0821 L.atm.mol-1.K-1) Mass of residual liquid = 1.6384 g Pressure = 745.6 torr Volume of vapor = 327.8 mL Temp. of vapor = 100.0 Chttps://www.youtube.com/watch?v=GpRqht0o4w4If the initial pressure of the air in the flask was 0.985atm at 298.15k what would the corrected pressure of the air be at 327.76K. For a given liquid a plot of the lnP versus 1/T gives a straight line with a slope of -5199k. What is the Hvap of this liquid?
- 10.11/ A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy is heated to 250°C (480°F), at which temperature it is entirely an a-phase solid solution . The alloy is to be melted to the extent that 50% of the speci- men is liquid, the remainder being the a phase. This may be accomplished either by heating the alloy or changing its composi- tion while holding the temperature con- stant. (a) To what temperature must the speci- men be heated? (b) How much tin must be added to the 1.5-kg specimen at 250°C to achieve this state? 10.15) A magnesium-lead alloy of mass 5.5 ka consists of a solid a phase that has a compo- sition that is just slightly below the solubility limit at 200°C (390°F). (a) What mass of lead is in the alloy? (b) If the alloy is heated to 350°C (660°F). how much more lead may be dissolved in the a phase without exceeding the solubility limit of this phase? 10.27 A hypothetical A-B alloy of composition 55 wt% B-45 wt% A at some temperature is found to consist of mass…In an experiment carried out at a temperature of 4700C and a pressure of 100 atmosphere, 4.3g of a volatile liquid produced 30.6cm3of the gas. Calculate the molar mass of the liquid. (Molar gas constant, R= 8.314JKmol, molar gas volume at stp = 22400cm3, 1 atmosphere= 1.0 x 10 Nm-2)Calculate the values of vrms, vmp, and vmean for Cl2 (70.90 g mol-1) at 25 °C
- 1. "Band structure" of "Hatom chain" and "H mole chain" are drawn as "graphs" and "intermediate process". Describe it in detail.Komal found that her vial of isopropyl alcohol showed a much better surfacetension bubble shape (a higher bubble) than her vial of water. Her peer groupsuggested some experimental errors that may have caused this to happen.Which three experimental errors are most likely to have occurreddesired Mg mass =0.0340g "Atmospheric pressure (mmHg): 733.59Trial 1 and Trial 2 values separated by commas:Mass of Mg (g): 0.038, 0.031Temperature (°C): 20.2 (both trials)Vapor pressure of water (mmHg): 17.86 (both trials)Volume of gas (mL): 42.95, 35.80 need calculations for table.
- The term “airbag” itself is misleading since there’s no significant “air” in these cushions. They are, instead, shaped and vented nylon-fabric pillows that fill, when deployed, with nitrogen gas. They are designed to supplement seatbelt restraints and help distribute the load exerted on a human body during an accident to minimize the deceleration rate and likelihood of injury. But while “supplement the seatbelt” is the mission of airbags, federal regulations require that they be tested and made effective for unbelted occupants, vastly complicating their task. Airbags must do their work quickly because the window of opportunity—the time between a car’s collision with an object and an occupant’s impact on the steering wheel or instrument panel—lasts only milliseconds. For illustration’s sake, imagine a Corvette hitting a bridge abutment head-on at 30 mph. The clock starts the instant the tip of the car’s nose hits the concrete. The Mechanics There are six main parts of an airbag system:…Ethanol vapours were allowed to completely fill a Culligan jug with a volume of 18.9L. The ethanol was burned yielding 9.6mL of LIQUID water in the bottom of the jug. C2H5OH + 3 O2 --> 2 CO2 + 3 H20 If the room temperature was 23.5 oC and the pressure was 97.5KpA, calculate the percentage yield of the water gathered in the jug. (density of water = 1.00 g/mL) - 24% - 76% - 17% - not enough informationPV = nRT. The pressure is 0.9912atm. V = 50.5 mL. T = 21.5°C and n = 0.00200mol. Calculate R from this data in Latm/molK.