It is an element so pure substance...Roll Tide
Not by itself, its a pure substance.
Pure Substance
No. Hydrogen is a pure substance.
Water vapor is a gas, not a mixture. Water vapor is just the gas form of water, it is not a mixture.Water Vapor is a compound made by bonding Hydrogen and Oxygen.
No, hydrogen gas is a pure substance.
It is an element so pure substance...Roll Tide
No. Hydrogen gas is an element, making it a pure substance.
Not by itself, its a pure substance.
Pure Substance
Helium is pure as it is on the periodic table.
Yes, gas is a pure substance.
Mixture, because it is mixed with all sorts of chemicals, such as smog, and or pollen.Mixture is NOT a pure substance, because to be a pure substance, it can't be mixed with anything.
No. Hydrogen is a pure substance.
Water vapor is a gas, not a mixture. Water vapor is just the gas form of water, it is not a mixture.Water Vapor is a compound made by bonding Hydrogen and Oxygen.
Hydrogen is a pure substance because it is a single element made up of only 1 type of particle.
Helium gas is a pure substance