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
You can't. Paper is too fragile to have such a substance removed from it without damaging it. but you CAN write OVER whiteout, obviously.
pure substance, propanone
it is a pure substance.... not
Pure substance
A pure substance is the same throughout. When a substance is 100% something it is pure.
Methane is a pure substance.
Helium is pure as it is on the periodic table.
silicon is a pure substance because it is an element and as we know an element is a pure substance
Silicon is an element. Its symbol is Si.
pure substance
Pure Substance
pure substance