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16 grams of oxygen, O2, is 0.5 mole, 2 grams of helium, He, is also 0.5 mole. They therefore contain the same number of gas "particles" (molecules for O2, atoms for He) and they will have almost identical volumes at the same pressure

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When a helium balloon rises in the air it expands. If the volume of the balloon doubles what happens to the density of the helium inside it?

If the volume of the helium balloon doubles as it rises, the density of the helium inside it decreases. This is because the same amount of helium gas is now spread out over a larger volume, leading to a lower density.


When a helium balloon rises in the air it expands If the volume of the balloon doubles what happens to the density of the helium inside it?

If the volume of the balloon doubles while the mass of helium remains the same, the density of helium inside the balloon would decrease by half. Density is calculated as mass divided by volume, so if volume doubles and mass stays the same, the density will decrease.


Why do helium balloons rise in air?

The helium balloon rises in air because the density of helium inside the balloon is less than that of the surrounded air that is displaced by the balloons volume. So the balloon is lighter than the surrounding air. Ice cubes float in a glass of liquid water for the same reason.


Why does a balloon filled with helium rise with a balloon filled with an equal volume of average atmospheric air does not?

Helium is less dense than air, so a balloon filled with helium is lighter than the same volume of air. This buoyancy force allows the helium-filled balloon to rise. On the other hand, a balloon filled with air has the same density as the surrounding air, so there is no buoyant force to make it rise.


Why does helium filled balloon float up when it is released?

Because the helium is lighter then the sorrounding airBecause the balloon PLUS the gas in it weights less than the volume of air displaced by the balloon.


Is helium in a balloon an example of matter?

Matter is anything that has volume and occupies space. Helium (in balloon) is a gas and has both these properties. So. it is an example of matter.


What volume of helium in a balloon half a mm thick?

You will need to know the actual size of the balloon as the bigger its inflated the more gas volume required.


Why does the helium balloon rise while the ordinary air failed?

Helium is a very light compound. Air consists out of 21 % oxygen gas, 78% nitrogen gas and 1% other gases (such as argon and other noble gases) in general. As we know, wood floats on water because it is lighter per volume. For helium, the same rule counts. Helium is lighter than oxygen and nitrogen.


How much helium is in a balloon that contains 0.54 grams of gas?

0.54 grams 1 mol = mass / Mr = mass / 4 (Helium's atomic weight is 4, it is a monoatomic gas) 1 mol = 0.54 / 4 = 0.00135 # of molecules of helium in the balloon = 0.00135 * 6.02 * 10^23


What is the mixture 15ml of oxygen and 5ml of helium?

A mixture of oxygen and helium is used in diving.


Does the size of a balloon change the power of the pull?

yes it does


Which one would compress more helium balloon or a water balloon?

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