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Yes, gas is a pure substance.
Helium is pure as it is on the periodic table.
What gas is not readily available in pure form
Helium gas is a pure substance
Argon is a pure gas, and an element.
Pure. (gas)
Pure Oil Gas Station was created in 1933.
nitrogen gas is BASICALLY JUST PLAIN NITROGEN AND THUS IT IS A PURE SUBSTANCE.
Neon is an element, and as such, is a pure substance.
Pure Hydrochloric Acid is a gas.
Helium is a pure chemical element.
Homogenous (gas is always homogenous, as pure liquid is, when pressurised from pure gas)