What is the number of molecules in 3 cubic metre of a gas at 3atm & 27°C? a) 2.17*10-20 b) 6.38*10-20 c) 3.86*10-20 d) 4.58*10-20
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What is the number of molecules in 3 cubic metre of a gas at 3atm & 27°C?
a) 2.17*10-20
b) 6.38*10-20
c) 3.86*10-20
d) 4.58*10-20
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- A gas molecule with a molecular mass of 44u has a speed of 337 m/s. What is the temperature of the gas molecule? O 6.0 x 104 K O2.0 x 104 K O 2.0 x 105 K O 2.0 x 10² K O 6.0 x 10² Ka) Estimate the average spacing between the molecules of 1 mol of an ideal gas at a pressure of 1atm and a temperature of 300 K. b) 1 mol of liquid water occupies a volume of 18 cm. Estimate the spacing between molecules. c) Use your result from part (a) to estimate the diameter of a water molecule. d) Estimate the factor by which water expands when it boilsE) the Maxwell speed distribution. A certain quantity of hydrogen occupies a volume of 1000 cm² at 0 °C and ordinary atmospheric pressure. 24. If the pressure is tripled but the temperature is held constant, what will the volume of the hydrogen be? A) 3.33 m B) 33.3 m' C) 33.3 x 10° m D) 3.33 x 104 m' E) The correct answer is not given
- 7) A gas has a volume of 5 cubic feet and a gauge pressure of 3 atm at a temperature 40 degrees Fahrenheit.The volume is decrease to 2 cubic feet and the temperature is raised to 140 degrees Fahrenheit.What is the new gauge pressure in atm’s?A3] a) Find the temperature of 1 mole of oxygen molecules if they occupy a volume of 4 L and have a pressure of 6 x 10° Pa. You should treat the oxygen as an ideal gas and take the value of the universal gas constant to be R = 8.31J mol1 K-. b) What is the density of the oxygen? You may assume that the mass of I mole of oxygen molecules is 32 g. c) What is the mean square velocity of the oxygen molecules? d) State two assumptions of the kinetic theory of ideal gases that the van der Waals model does not require to be true.12) An ideal gas occupies 6.00 x 102 cm³ at 20°C. At what temperature will it occupy 1.20 x 103 cm³ if the pressure is held constant? A) 100°C B) 40°C C) 313°C D) 10°C
- 4. An ideal gas is contained in a vessel of volume 12 L (12 liters) at a temperature of 20 °C and a pressure of 9 atm. a) How many moles of gas are in the vessel? b) How many molecules of gas are in the vessel?It is known that 28 g of a certain ideal gas occupy 26.4 liters at standard conditions (0° C, 1 atm). The volume occupied by 42 g of this gas at standard conditions (in liters) is: a. 22.4 b. 14.9 c. 33.4 d. more data are needed e. 39.6If 23.5 moles of an ideal gas occupies 0.0465 cubic meters at 14.5 °C, what is the pressure of the gas? pressure: Pa
- A gas under constant pressure has a volume of 30.57m^3 and a temperature of 59.0 K. A change in temperature caused the volume to change to 121.14m^3. Based on the relationship between volume and temperature, what must have happened to the temperature? A- Temperature decreased B- Temperature increased C- Temperature stayed the same D- Temperature trend can not be determinedA 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.Find the temperature of a gas where each molecule has an average kinetic energy of 9.9 x 10-21 J. T = unit K