testing the ideal gas law (magnesium ribbon experiment
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- A 10-L stirred tank is used to cultivate mouse myeloma cells. Dry air is sparged from the bottom at 1.0 L/min to supply oxygen to the system. The gas composition at the outler is 16% oxygen, 3.5% CO2, 6.5% water vapor, and balanced nitrogen. The ambient pressure and temperature are 1 atm and 37 °C, respectively. The dissolved oxygen in the reactor is controlled at 20% of saturation with ambient air. What is the respiratory quotinent (RQ) (i.e., mole CO2 produced/mol O2 consumed)? Assume that the mole fraction of CO2 in the ambient air is negligible. The universal gas constant R = 0.082 L*atm/mol*KA 10-L stirred tank is used to cultivate mouse myeloma cells. Dry air is sparged from the bottom at 1.0 L/min to supply oxygen to the system. The gas composition at the outler is 16% oxygen, 3.5% CO2, 6.5% water vapor, and balanced nitrogen. The ambient pressure and temperature are 1 atm and 37 °C, respectively. The dissolved oxygen in the reactor is controlled at 20% of saturation with ambient air. a. Assuming the reactor is at a steady-state, what is the volumetric oxygen transfer coefficient (kLa)? b. The specific OUR of myeloma cells is 5*10-11 mmol/cell*h. What is the cell concentration? c. What is the respiratory quotinent (RQ) (i.e., mole CO2 produced/mol O2 consumed)? Assume that the mole fraction of CO2 in the ambient air is negligible. The universal gas constant R = 0.082 L*atm/mol*KFigure 1 show the shape of the peaks in gas chromatography that causes loss of column efficiency. Determine the type of shape and identify two possible solutions to fix it. INJ Time (min)
- Using the fraction conversion method solve the following Convert 500 mL=______qtA student not well-familiarized with the order of the procedures in the experiment, unwarily measured and recorded the temperature of the water in the beaker at 23°C before, instead of after, doing the reaction. However, during the course of the experiment, the lab air conditioning failed, considerably heating the water. The measured h will ________. still be the same increase decrease indeterminate Here is the overview of the experiment:One hundred (100) ml of raw goat's milk bought from a street vendor is added in bottle 1 which initially contains 900 ml diluent. The sample was serially diluted by transferring 10 ml each to the succeeding bottles 2, 3 and 4 all of which contain 90ml diluent. Calculate the final dilution in bottle 4 expressed in decimal number. (Attach a screenshot of your computations at the end of the assessment). 0.01 0.001 0.0001 0.00001 0.000001
- Lab students placed ten spinach leaf disks in each of three test tubes containing a baking soda solution and a control tube without baking soda. The volume of liquid in each tube and the temperature of the solutions were held constant. All tubes were placed an equal distance from a light source as indicated in the accompanying table. After 10 minutes, the amount of oxygen present in each sample was measured. Test Tube Grams of Baking Soda (CO2 source) Wattage of Light Bulb 1 0.5 25 2 0.5 50 3 0.5 75 4 0 75 Which tube is expected to contain the greatest quantity of oxygen? Tube 1 Tube 2 Tube 3 Tube 41 2 3 1 point Mike needs to pipette 25 uL of solution. Which pipette should he use to pipette the most accurate amount of solution? P1000 OP20 1 point You need to pipette a solution of 150 uL. What pipette will you use? What will you set this pipette to (i.e. what will the numbers read on the pipette?) P1000; 0150 2000 P10 P200 ▶⠀ ⠀ > > n P10; 015 1 point Which of the following are best practices for using a micropipette? Select all that apply. Never exceed the upper or lower limit of the pipette If only pipetting a little extra, use a pipette outside of the range limit Point the pipette tip upwards Use a new tip for different liquids When withdrawing liquids, always release the plunger slowly P200; 150 P20; 150Given the DDF (Density Displacement factor) for morphine HCI is 1.6, calculate the quantity of cocoa butter needed to prepare the following: Morphine HCI: 100mg Cocoa butter: Q.S Quantity of suppositories to make: #7
- For the nitrate reduction test, complete the table below Reaction Gas evolution (Yes/No) Color after adding reagents Color after adding zinc dust NO3 to NO2 NO3 to N2 NO3 to ammonia No reactionLab students placed ten spinach leaf disks in each of three test tubes containing a baking soda solution and a control tube without baking soda. The volume of liquid in each tube and the temperature of the solutions were held constant. All tubes were placed an equal distance from the light source indicated in the accompanying table. After 10 minutes, the amount of oxygen present in each sample was measured. Test Tube Grams of Baking Soda (CO2 source) Wattage of Light Bulb 1 0.5 25 2 0.5 50 3 0.5 75 4 0 75 Which tube is expected to produce the least amount of oxygen? a) Tube 1 b) Tube 2 c) Tube 3 d) Tube 4Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. Co(NO3)2 (or CoCl2)From the stock solution (1.0 M), determine the volume needed to prepare 0.00, 0.04, 0.08, 0.12 and 0.16 M Co(NO3)2 solution in 50 mL volumetric flask. Obtain the calculated amounts, place in corresponding volumetric flasks and dilute to mark.
