Phosphotungstic acid was prepared however it did not turn into a solid when placed on the rotary evaporator, it instead formed a pale yellow slurry. Why might this have happened?
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Phosphotungstic acid was prepared however it did not turn into a solid when placed on the rotary evaporator, it instead formed a pale yellow slurry. Why might this have happened?
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- An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295k and volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1 mL atm K-1 mol-1. How many grams of Magnesium metal were used? you need to count the vapor pressure in the system, so the corrected pressure should be 736-19.8, then to calculate the mass of MgDescribe the classification of evaporators. Explain the factors that affect evaporationprocess. Please answer at your own easy words.When a meteorologist reports precipitation in the weather forecast, this is usually associated with a low-pressure system. Go through the following activity to explain why precipitation would be associated with a low atmospheric pressure. Air that is saturated or contains water vapor will have more water and [ Select ] v dry air in the overall mixture compared to dry air. This causes the overall density of the air to [ Select ] V. The air will be [ Select ] dense than dry air and the atmospheric pressure will be [Select] than dry air.
- So here are a series of experiments:1. A balloon was held against a wall. When it was released, the balloon fell to the floor. 2. A balloon was rubbed with a piece of wool and again held against a wall. This time, whenthe balloon was released it stuck to the wall. 3. A hole was poked in the bottom of a plastic cup. The cup was filled with water, and thewater was allowed to drain out through the hole in the bottom of the cup. While the water wasrunning out the bottom of the cup, a balloon was held near the stream of water. The watercontinued to fall straight down. 4. The previous demonstration was repeated, except this time the balloon was rubbed withwool before it was held near the stream of water. This time, the stream of water was drawntoward the balloon instead of falling straight down. Please explain all of the above. Also please show that you have a really good understanding ofthe laws of electrostatics and the structure of atoms as you do so, and use each of the following terms…Chapter 14, Problem 50 Carbon tetrachloride (CCI4) is diffusing through benzene (CgHs), as the drawing illustrates. The concentration of CCI, at the left end of the tube is maintained at 1.65 x 10-2 kg/m3, and the diffusion constant is 19.5 x 10-10 m2/s. The CCI4 enters the tube at a mass rate of 5.56 x 1013 kg/s. Using these data and those shown in the drawing, find (a) the mass of CCI4 per second that passes point A and (b) the concentration of CCl, at point A. 5.00 x 10-3 m Cross-sectional area = 3.00 x 10-4 m2In the process of chemical vapor deposition (CVD), a chromium compound in the gas phase is decomposed on a hot surface. The result is a thin film of chromium metal formed on the surface. CVD has been studied by the Raytheon Corporation in El Segundo,CA for use in satellite and defense systems. The chromium metal film crystallized in a body-centered cubic cell. How many chromium atoms are there per unit cell? A.) 1 B.) 2 C.) 3 D.) 4
- A student measured the concentration of H₂SO4 by titrating it with 3 L of NH3 at 646 torr and 305 K. The experiment revealed that 144 mL of H₂SO4 was required to neutralize the NH3. Calculate the concentration of the acid in terms of normality. 1.80 N 0.780 N 0.708 N 0.540 N 277 ADVANIn the process of chemical vapor deposition (CVD), a chromium compound in the gas phase is decomposed on a hot surface. The result is a thin film of chromium metal formed on the surface. CVD has been studied by the Raytheon Corporation in El Segundo, CA for use in satellite and defense systems. The chromium metal film crystallized in a body-centered cubic cell. How many chromium atoms are there per unit cell? Question 10 options: 4 3 2 1Consider a box divided in half. One side is filled with 1 mol Ne at 300 Kelvin, and the other is filled with 1 mol Rn at 300 Kelvin. A small hole is opened in the divider between the sides, allowing the gases to mix. Suppose it takes 4.0 minutes for the Rn pressure to equilibrate between the two sides. How long (min) will it take the Ne pressure to equilibrate?
- Carbon tetrachloride (CC14) is diffusing through benzene (C6H6), as the drawing illustrates. The concentration of CCl4 at the left end of the tube is maintained at 1.95 x 10-2 kg/m3, and the diffusion constant is 20.4 x 10-10 m²/s. The CCl4 enters the tube at a mass rate of 4.52 x 10-13 kg/s. Using these data and those shown in the drawing, find (a) the mass of CCl4 per second that passes point A and (b) the concentration of CCl4 at point A. (a) Number i (b) Number i Units Units 5.00 x 10-³ m -CCIA Cross-sectional area = 3.00 x 10-4 m²By the means of gas stoichiometry, how deodorants are created?Why is it not necessary to know the mass of the volatile liquid initially added to the flask? What assumption is being made in determining each of the following? The mass of the vapor. The volume of the vapor. The temperature of the vapor. The pressure of the vapor. How will the unknown’s reported molar mass be affected in each of the following cases The atmospheric pressure is recorded too high. A small piece of the foil cap was lost before the final mass was measured. Condensed water vapor from the bath was trapped underneath the foil cap. The vapor’s volume is assumed to be 125 mL (marked on the side of the flask) instead of the measured volume of the flask. Heating the flask too long resulted in air outside the flask entering and displacing some of the vapor inside the flask. The thermometer is miscalibrated and reads a constant amount too low over its entire temperature range.