In chemistry, there is no known substance with the formula Cr2O3NO3. It is possible that the teacher wrote the chemical formula incorrectly. We can analyze this formula according to different atoms:
– Cr: is the symbol for Chromium – a chemical element belonging to the transition group, with an atomic number of 24. Chromium is blue-grey, stable, and hard.
– O: is the symbol for Oxygen – a chemical element belonging to the nonmetals group, with an atomic number of 8. Oxygen plays a very important role in life and many chemical processes.
– N: is the symbol for Nitrogen – a chemical element belonging to the nonmetals group, with an atomic number of 7. Nitrogen makes up 78% of the Earth’s atmosphere and plays an important role in biology.
If we separate the formula into Cr2O3 and NO3, we can find a chemical for each part:
– Cr2O3: is Chromium(III) oxide or Chromium green oxide. This is a solid crystal substance that is green to black, insoluble in water, and non-toxic. It is used as a colorant in the production of green glass and is a component in some types of paint.
– NO3: is a nitrate ion, a polyatomic ion with the chemical formula NO₃. The nitrate ion has a negative charge and is the basis of many important compounds.
However, there is no known chemical substance with the formula Cr2O3NO3.