one of the properties of matter is density. density is defined as the mass per unit of volume of a substance. a substance that is more dense than another has more mass for the same volume than the other substance.

Density of gases : chlorine-3.21, ethyne-1.17, helium-0.18, hydrogen-0.09, nitrogen-1.25

Which one of the following gases would most readily flow along the ground if accidentally released?
A-chlorine
B-ethyne
C-helium
D-hydrogen
E-nitrogen

4 answers

The more dense, the more easily it sinks to the ground.
Thank you @DrBob222
Hydrogen
It's chlorine 3.21
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