There is a 5.24 ppm of He in air. ppm means that 5.24 parts of helium goes per 1000000 parts of air (million part of air). In % this would be 0.000524% of He.
The density of helium is less than the density of air. You can infer this without doing any calculations by thinking about the classic example of inhaling the helium from a balloon and talking. Your voice gets squeeky high because helium is less dense than air - that is, your sound waves propagate faster through helium than through air, therefore helium is less dense.
Yes, all substances have density. Helium has a density of 0.1664 g/liter at 20°C and one atmosphere of pressure.
Balloons filled with helium float because helium is lighter than the surrounding air, creating a lifting force. This is known as buoyancy. Regular air-filled balloons are denser than the surrounding air and do not float.
helium doesn't have a specific gravity
Of course you CAN mix it. you can mix anything as long as you have it.
Air has many more different substances than helium, which is a single substance. Outside air contains helium.
Helium is lighter than air. so balloons filled with helium will float in air
Helium is lighter than air. So helium balloon rises in air.
There are many, but one is Helium
Helium, hydrogen, and air are gases.
Yes. air is heavier than helium.
helium is a gas. air is a bunch of different gasses.
Helium has a lower density than air.
because helium is ligter than air
Helium is lighter than air. So balloons or air ships filled with helium will float.
Helium is lighter than air. hence helium balloon will float in air.
The density of helium is less than the density of air. You can infer this without doing any calculations by thinking about the classic example of inhaling the helium from a balloon and talking. Your voice gets squeeky high because helium is less dense than air - that is, your sound waves propagate faster through helium than through air, therefore helium is less dense.