Chalk is calcium carbonate - CaCO3.
Any chemical compound contain some impurities.
ingredients of chalk
Yeah it is
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
A pure substance is the same throughout. When a substance is 100% something it is pure.
silicon is a pure substance because it is an element and as we know an element is a pure substance
Air is not a pure substance.
pure substance
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
It's a pure substance because even though the atoms are different they still the same. If that makes sense?
The chalk-like substance is, in fact, chalk.
cuz when my penis was in your GF's vag, she said she only felt one element:cum
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.