Chalk is calcium carbonate - CaCO3.
Any chemical compound contain some impurities.
Chalk is not a pure substance as it is typically composed of calcium carbonate along with other impurities. Pure substances are made up of only one type of atom or molecule.
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?
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
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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 soft, white, powdery limestone often used for writing or drawing on blackboards or sidewalks. It is made up of calcium carbonate and is easily erasable with a damp cloth.
Methane is a pure substance.
A pure substance is constant in composition throughout, meaning it is made up of only one type of particle or element. This distinguishes it from a mixture, which contains two or more different substances that are physically combined.
Helium is pure as it is on the periodic table.