Question

What is the chemical formula for chromium (III) oxide?

Answer 1

Hint : To answer this question, we first need to understand what are compounds. A chemical compound is a substance made up of numerous identical molecules bound together by chemical bonds and made up of atoms from different elements. As a result, a molecule made up of only one element's atoms is not a compound.

Complete Step By Step Answer:
Chemical formula - A chemical formula is a technique of expressing information on the chemical quantities of atoms that make up a chemical compound or molecule using chemical element symbols, numbers, and other symbols like parentheses, dashes, brackets, commas, and plus and minus signs.
chromium (III) oxide - The inorganic compound chromium (III) oxide (or chromia) has the formula $C{r_2}{O_3}$ . It is one of the most common chromium oxides and is used as a pigment. Eskolaite, a rare mineral, is found in nature. It has a corundum structure, which consists of a hexagonal close packed array of oxide anions with chromium occupying 2/3 of the octahedral holes.
It is a hard, brittle substance similar to corundum (Mohs hardness 8 to 8.5). Up to 307 K, the Néel temperature, it is antiferromagnetic. Acids have a hard time attacking it. Eskolaite, a mineral high in chromium, can be found in chromium-rich tremolite skarns, metaquartzite, and chlorite veins.
Eskolaite is also an uncommon chondrite meteorite component. Pentti Eskola, a Finnish geologist, is honored with the mineral's name.
So, we conclude that the chemical formula for chromium (III) oxide is $C{r_2}{O_3}$ .

Note :
Chromium (iii) oxide is a green pigment used in inks, glassware, and paints, as well as a colorant for ceramics and a glaze that has a subtle green tint. It's used as an abrasive for polishing or stropping razor blades, knives, and optical device surfaces.