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- An arctic weather balloon is filled with 40.7 L of helium gas inside a prep shed. The temperature inside the shed is 7.°C. The balloon is then taken outside, where the temperature is −11.°C. Calculate the new volume of the balloon.You may assume the pressure on the balloon stays constant at exactly 1atm. Round your answer to 3 significant digits.-A piece of stone weighs 0.05 pounds. When it is submerged in a graduated cylinder containing 50 ml of water, the level rises to 60 ml. What is the density of stone in g/ml. Ans 2.27 g/ml -The temperature at which mercury freezes is -35°C. What temperature in degrees Fahrenheit at which a mercury thermometer cannot be used? Ans. -31 °FA hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a. If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.
- A gas is heated to 75 °C and a pressure of 200 kPa. If the container is compressed to hold a volume of 700 mL, what was the volume of the gas, (in litres), at a temperature of 40 °C and 100 kPa pressure? B. A vessel of volume 5x10-5 m3 contains hydrogen at a pressure of 1.5 Pa at a temperature of 37 °C. Estimate: i. The number of molecules of hydrogen gas in the vessel. (4 marks) ii. The number of moles of hydrogen. iii. Mass of hydrogen iv. The kinetic energy of hydrogen. v. The root mean square speed. Given: M = 1.008 g/mol; R = 8.31 J/mol-K; NA = 6.02 x 1023 mol-1; k = 1.38 x 10-23 J/KHi please help:A cylinder bore in an aluminum engine block has a diameter of 95.00 mm at 20.00 degrees Celsius A. What is the diameter of the bore when the engine operates at 120.0 degrees Celsius? Express answer using 4 significant digits and in mm. B. At what temperature is the diameter of the hole equal to 94.85mm? Express your answer using 2 significant figures.5. An automobile tire contains 3730 cubic inch of air and 32 psig and 80 degrees fahrenheit. (a) what mass of air is in the tire? (b) In operation, the air temperature increases to 145 degrees fahrenheit. if the tire is inflexible what is the resulting percentage increase in gauge pressure? (c) what mass of the 145 degrees fahrenheit air must be bled off to reduce the pressure back to its original value? R = 53.342 ft.lb/lb.R.
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