Pentane (C5H12) is a liquid with a density of 0.626 g/mL near 25°C. Use the equation below to find the true mass of pentane when the mass weighed in air is 14.36 g. Assume that the air density is 0.0012 g/mL and the balance weight density is 8.0 g/mL. m=m'(1-(da/da))/(1-da/dw)
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Pentane (C5H12) is a liquid with a density of 0.626 g/mL near 25°C. Use the equation below to find the true mass of pentane when the mass weighed in air is 14.36 g. Assume that the air density is 0.0012 g/mL and the balance weight density is 8.0 g/mL.
m=m'(1-(da/da))/(1-da/dw)
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- A pipet is used to transfer 5.00 mL of a 1.25 M stock solution in flask “S” to a 25.00-mL volumetric flask “B,” which is then diluted with DI H2O to the calibration mark. The solution is thoroughly mixed. Next, 3.00 mL of the solution in volumetric flask “A” is transferred by pipet to a 50.00-mL volumetric flask “B” and then diluted with DI H2O to the calibration mark. Calculate the molarity of the solution in volumetric flask “B.”When concentrated nitric is sold, the label contains no mention of the molarity of the acid. Instead, the label normally lists the concentration of nitric acid as a wt/wt percent and gives the specific gravity of the solution. If the solution is 68.0 (wt/wt %) and nitric acid and has a specific gravity of 1.41 kg/L, calculate the molarity of 68.0 % concentrated nitric acid. FW HNO3=63.01g/molSum of coefficients C7H8 + O2 --> CO2 + H2O after balancing
- The percentage of an additive in gasoline was measured six times with the following results: 0.13; 0.12; 0.16; 0.17; 0.20 and 0.11%. What is the 99% confidence interval for the additive percentage?In a river with a constant flow rate, the factory releases wastewater containing NaCl at a concentration of 200 mmol / L to the river at 20.0 L / s. The Na+ and Cl- concentrations at the downstream observation point were 1.00 mmol / L and 0.800 mmol / L, respectively. What is the river flow Q and Cl- concentration before the inflow of drainage? The river originally contains 0.500 mmol / L of Na+.A pipet is used to transfer 6.00 mLmL of a 3.75 MM stock solution in flask “S” to a 25.00-mL volumetric flask “A,” which is then diluted with DI H2OH2O to the calibration mark. The solution is thoroughly mixed. Next, 10.00 mLmL of the solution in volumetric flask “A” is transferred by pipet to a 50.00-mL volumetric flask “B” and then diluted with DI H2OH2O to the calibration mark. Calculate the molarity of the solution in volumetric flask “B.”
- In an experiment to calibrate a 50 ml burette at 30 ⁰C, a student calculated the volume corrections for a series of volumes delivered by the burette and recorded the following data 1. Plot a graph of volume corrections against apparent volumes and briefly describe the nature of the graph 2. If a student used this burette to measure 45ml of water at 30⁰C, what will be the true volume of water delivered at this temperatureThe value for Kw in vinegar (5M acetic acid) is __________. A 1.0 X 10-7 B 2.5 X 10-3 C 5.0 X 10-14 D 1.0 X 10-14 E 5.0 X 10-7You are absolutely the BEST. Finally someone that dosen't calculate this exercise as 836f66dgsffjgvkik!!!! I understand everything you did, but I have one question. Some experts says that km can be calculated by saying Vmax from date divided by 2 and then they find Km by going down on x-axis on the graph. But, you used the MM equation, to solve for Km. Is both method the same? Or is one of them more precise than the other? *And if theres no need to reply back after you answering my question, then I will thank you again for your help. I have more these types of exam questions that I will probably upload later, and I hope someone like you will look at it.