Yes, it's a single chemical compound.
it is a pure substance.... not
Methane is a pure substance.
Helium is pure as it is on the periodic table.
Silicon is an element. Its symbol is Si.
pure substance
Yes, PCl3, or phosphorus trichloride, is considered a pure substance. This substance is considered pure because its composition does not vary.
Sodium phosphate is a compound and not a mixture. It consists of sodium, phosphorus and oxygen chemically combined together into a pure substance.
Pure phosphorus is extracted my chemical means and can be bought, but it does not occur in nature.
Phosphorus is a chemical element. So it existed long before man appeared on earth and is, therefore, definitely not man-made. However, because it is so reactive it is never found in its pure form on earth. Thus, any quantity of the pure substance must be made by us from one of the phosphorus compounds that occurs naturally.
pure substance, propanone
it is a pure substance.... not
Pure substance
Methane is a pure substance.
A pure substance is the same throughout. When a substance is 100% something it is pure.
Helium is pure as it is on the periodic table.
Silicon is an element. Its symbol is Si.
silicon is a pure substance because it is an element and as we know an element is a pure substance