a helium balloon contains 2.55 kg of helium. How many atoms of helium are in the...
(a) How many atoms of helium gas fill a spherical balloon of diameter 30.8 cm at 19.0°C and 1.00 atm? atoms (b) What is the average kinetic energy of the helium atoms? (c) What is the rms speed of the helium atoms? km/s
A spherical balloon of volume 4.05 x 103 cm3 contains helium at a pressure of 1.15 x 105 Pa. How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 x 10-22 J? mol
Fun with a helium balloon A loosely filled balloon contains 4.5 liters of helium gas at atmospheric pressure (PA = 101 kPa) and room temperature T = 20 C. The gas in the balloon is then heated to body temperature, 37 C, by a student. (a) The pressure inside the balloon changes very little during the heating process. What is the change in the volume of the balloon? (b) How much work does the expanding balloon do on its environment?...
A spherical balloon of volume 3.90 times 10^3 cm^3 contains helium at a pressure of 1.15 times 10^5 Pa. How many moles of helium are in the balloon if the average kinetic energy of the helium atoms is 3.60 times 10^-22 J? mol
A balloon is filled with helium gas, it contains only helium. Does anything exist between the atoms of helium? If so, what?
10. A balloon contains mostly helium and a little methane. The partial pressure of helium is 101.2 torr. If the pressure inside the balloon is 823.3 torr, what is the partial pressure of methane? 11. How many moles does 11.2 L of hydrogen gas contain at STP? How many particles (hydrogen molecules) does it contain? 12. What is the volume of a container if it holds 8.8 g of carbon dioxide at STP?
What is the mass, in g, of 4.39 mol Xe? How many helium atoms are there in a helium blimp containing 4.27 kg of helium? Determine the number of atoms in 2.26 g Hg.
a) How many molecules of helium are required to fill a balloon with a diameter of 50 cm at a temperature of 27°C? b) What is the average kinetic energy of each molecule of helium? What is the average velocity of each molecule of helium?
A 0.300 kg balloon is filled with helium until the volume of the balloon is 1.50m3. The density of the contained helium is 0.178 kg/m3, and the density of the surrounding air is 1.29 kg/m3. What downward force must be applied to the balloon to prevent it from rising?
To know how many Helium balloons are needed to lift a girl who weighs 35 kg, one intends to measure how much weight a single balloon can lift. A scale that is sensitive to 0.1 g, small pieces of copper, and an ordinary party balloon show that a balloon with a volume of about 2 l can lift 2g of copper. How many balloons will it take to lift the girl? Does this agree with the result obtained if you...