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Hire A Tutor For Your Homework www.helpingtutors.com Alternatevely contact me for it's solution at flat rate of $20 licservernoida@gmail.comattached is a couple of…
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Hire A Tutor For Your Homework www.helpingtutors.com Alternatevely contact me for it's solution at flat rate of $20 licservernoida@gmail.comattached is a couple of multiple questions. please pay attention to the instructions. thanks 1. The column of a mercury barometer is calibrated in linear units (such as inches or millimeters) and thus the air pressure observed on such a barometer is reported in terms of these linear units. Some conversion factors are shown here. Part A The barometer shown here (Figure 1) measures atmospheric pressure in millimeters of mercury (mmHg). According to this barometer, what is the atmospheric pressure P in inches of mercury (inHg)? Express your answer in inches of mercury using five significant figures Part B At a pressure of 919 mbar , what would the height of the mercury in the column of a mercury barometer? Express your answer numerically in millimeters of mercury. 2. The ideal gas law (PV=nRT) describes the relationship among pressure P, volume V, temperature T, and molar amount n. When some of these variables are constant, the ideal gas law can be rearranged in different ways to take the following forms where k is a constant: Name Expression Constant Boyle's law PV=nRT n and T =k Charles's law Avogadro's law VT=nRP= k Vn=RTP= k n and P T and P Part A A certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. The initial volume was 3.00 L and the initial pressure of chlorine was 1.95 atm . The piston was pushed down to change the volume to 1.00 L. Calculate the final pressure of the gas if the temperature and number of moles of chlorine remain constant.. (Figure 1) Express your answer with the appropriate units. Part B In an air-conditioned room at 19.0 ∘C, a spherical balloon had the diameter of 50.0 cm. When taken outside on a hot summer day, the balloon expanded to 51.0 cm in diameter. What was the temperature outside in degrees Celsius? Assume that the balloon is a perfect sphere and that the pressure and number of moles of air molecules remains the same. Express your answer with the appropriate units. Part C A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00 L to 2.70 L ? (The temperature was held constant.) Express your answer with the appropriate units. 4. Part A If all the N2 and H2 are consumed, what volume of NH3, at the same temperature and pressure, will be produced? Express your answer using two significant figures. 3.2 5. Part A How many air molecules are in a 13.0×12.0×10.0 ft room? Assume atmospheric pressure of 1.00atm, a room temperature of 20.0 ∘C, and ideal behavior. Volume conversion:There are 28.2 liters in one cubic foot. 7. Part A Given the atomic radius of radon, 1.5 AÅ , and knowing that a sphere has a volume of 4πr3/3, calculate the fraction of space that Rn atoms occupy in a sample of radon at STP.Express your answer using two significant figures. 13. At an underwater depth of 255 ft , the pressure is 8.33 atm . Part A What should the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to be 0.21 atm, the same as in air at 1 atm? 15. The kinetic molecular theory of gases explains how gas molecules behave in terms of motion, speed, and energy. One important aspect of this theory deals with the relationship between temperature and the average speed of the gas molecules. Increasing the temperature of a gas sample increases the average kinetic energy of the molecules. The kinetic energy of a molecule determines its speed. It is important to realize that not all molecules in a sample will have the same kinetic energy, which is why we refer to the average kinetic energy and the average speed. The speed of a particle with average kinetic energy is called the root mean square (rms) speed, vrms. The rms speed may be expressed by the following equation: vrms=3RTM−−−−√ where R is the ideal gas constant, T is the absolute temperature, and M is the molar mass of the substance in kilograms per mole. The constant motion of gas molecules causes diffusion and effusion. Diffusion is the gradual mixing of two substances resulting from the movement of their particles. Effusion is the gradual escape of gas molecules through microscopic holes in their container. Part A Which of the following statements are true? Check all that apply. 17. Part C 13.0 moles of gas are in a 8.00 L tank at 21.9 ∘C . Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol. Express your answer with the appropriate units.Hire A Tutor For Your Homework www.helpingtutors.com Alternatevely contact me for it's solution at flat rate of $20 licservernoida@gmail.com
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