A high altitude balloon contains 6.81 g of helium in `1.16xx10^(4)" L at"-23^(@)C.` Assuming ideal gas behaviour, how many grams of helium would have to be added to increase the pressure to `4.0xx10^(-3)` atm?
How many moles of Helium gas occupy 22.4 L at 0^(@)C at 1 atm pressure?
A tank contains 28.0 kg of O_(2) gas at a gauge pressure of 6.80 atm. If the oxygen is replaced by helium, how many kg of the latter will be needed to produce a gauge pressure of 8.25 atm ?
A high-altitude balloon is filled with 1.41xx10^(4)L of hydrogen at a temperature of 21^(@)C and a pressure of 745 torr. What is the volume of the balloon at a height of 20 km, where the temperature is -48^(@)C and the pressure is 63.1 torr?
A spherical balloon of volume 4.00 xx 10^(3) cm^(3) contains helium at a pressure of 1.20 xx 10^(5) Pa . How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 xx 10^(-22) J ?
A partially inflated balloon contains 500 m^3 of helium at 27^@ C and 1 atm pressure. What is the volume of the helium at an altitude of 18000 ft , where the pressure is 0.5 atm and the temperature is -3^@ C ?
Calculate the total pressure in a 10 litre cylinder which contains 0.4g of helium, 1.6g of oxygen and 1.4g of nitrogen at 27^(@)C . Also calculate the partial pressure of helium gas in the cylinder. Assume ideal behaviour of gases. Given R = 0.082 litre atm K^(-1) mol^(-1) .
