cuz when my penis was in your GF's vag, she said she only felt one element:cum
mm
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
Chalk is calcium carbonate - CaCO3. Any chemical compound contain some impurities.
It is not pure and it is not homogeneous.
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
Chalk is almost pure Calcium Carbonate. Chalk is a form of Calcium.
pure substance, propanone
it is a pure substance.... not
Pure substance
chalk is a very pure form of limestone made of calcite. i think >:P
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.