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- https://www.youtube.com/watch?v=GpRqht0o4w4In Part B, you used a similar procedure to that of Part A to determine the mass percent of CaCO3 in an antacid tablet. The commercially accepted range of CaCO3 in an antacid tablet is 25–35% by mass. Miranda obtained the data below from her Part B trial: TRIAL PRESSURE (torr) MASS OF TABLET (g) TEMPERATURE (°C) VOLUME CO2 RECOVERED (mL) 1 750.5 0.5702 21.3 69.6 2 750.5 0.5622 21.2 68.2 Miranda determined her average % Recovery of CO2 to be 65.0% from Part A. Based on her data collected from Part A, was the average percent mass of CaCO3 in her antacid tablet within the commercially accepted range? Yes, her mass percent does fall within the commercially accepted range. No, her mass percent does not fall within the commercially accepted range.(a) A commercial 737 jet transporting 143 passengers and 5 crew members from Kansas City (MCI) to Baltimore (BWI) burned 11,800 lb (about 1700 gallons) of Jet A fuel en route. Jet A fuel is kerosine based, consisting primarily of CnH2n+2 hydrocarbons, with n =6 to 16, so the carbon:hydrogen ratio is close to 1:2. During this flight, how much CO2 was released into the atmosphere? Assume the combustion of the fuel was complete, so all the fuel was burned to form CO2 and H2O. Give both the mass of CO2 produced (in kg and in lbs) and the volume it would occupy at 298 K, 1 atm.(b) How much CO2 would be released into the atmosphere if those passengers and crew made the trip instead, in pairs, in hybrid cars at 40 miles per gallon. Assume the density of the gasoline is 0.75 kg L-1 and that carbon and hydrogen dominate the composition in a ratio of 1:2. The road trip is 1082 miles.
- Aleks data for AgBrO3 is 5.38 x 10^-51. A student following the procedure described in this module collected the following data: mass Mg, g 0.0243 initial syringe volume, mL 1.0 final syringe volume, mL 26.5 barometric pressure, torr 754 temperature, K 298 Determination#1 The value of the gas law constant (R) is 0.0822 L.atm/mol.K Determination #2 he volume of hydrogen gas produced by the reaction of 0.243 g of magnesium metal and collected at 750 torr and 298 K = 248 mL The results of this experiment are greatly affected by the care with which each of the steps is completed (a) Describe the error that would occur if the magnesium were to slide into the HCl in the test tub before the system is sealed off (b) What would be the effect on the results of a rise in the room temperature from 22.0 celcius, when determination #1 was done, to 25.3 celcius, when determination #2 was made? (c) Why must the surface coating of MgO be removed prior to determining the mass of magnesium used in the experiment? (d) What would be the…Oxyacetylene torches rely on a precise mixture of fuel (C2H2(g)) to oxygen to optimize the welding process. _ C2H2 (g) + _ O2 (g) ---> CO2 (g) + _H2O (g) Calculate the volume (in L) of O2(g) required to react completely with 14.5 L of acetylene. Assume both substances are at SATP.
- State 6 required equipment for PVT analysis in oil and gas ?1) Mass of flask, aluminum foil, and rubber band 68.45g 2) Temp. Of boiling, water 98.20 0C 3) Barometric pressure 755 mmHg 4) Volume of flask (volume of vapor occupies flask) 152 ml 5) Mass of flask, aluminum foil, rubber band, and condensed vapor 68.60g 6) Mass of condensed vapor is (5)-(1) Find Molecular weight of unknown ______ g / mol Calculation PV = (m/M)RT) è M = (mRT) / PV = ? Unknown liquid- Based on Molecular weight determine which unknown below has this molecular weight: Methanol, Ethanol, Isopropanol, Propanol. UNKNOW IS : __________________________13. The burner gas's composition, as determined by Orsat, is devoid of SO3. true or false
- A batch of raw milk was tested and found to contain a bacterial population of 8xl06cfu/ml. It is to be pasteurised at noc for 33 seconds. The average D value at 52°C for the mixed population is 11 min. The z value is 10°C.i)Explain the terms "D value" and "z value".ii)Calculate how many organisms will be left after pasteurisation.iii)Hpw much time will be needed at 62°C to accomplish the same degree oflethality?iv. How much time will be needed at 82°C to achieve the same degree oflethality?What is the simplest CGS unit for "poise"?Determine the quantity of energy given 10.95 dm³ of oxygen gas at STP reacts in this equation" 3O2(g) + 4AlBr3(s) --> 2Al2O3(s) + 6Br2(l) + 90.23kJ kJ = (10.95dm³ O2 / 1) * (A/B) * (C/D) = E 1. Regarding (A/B) which statements may be used? 1 L 3 mol O2 +90.23 kJ 22.4 dm³ O2 -90.23 kJ 1 dm³ 1 mol O2 2. Regarding (C/D), what are the values of these variables?