What is the formula of potassium nitrate?

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Your answer is KNO3.

Potassium nitrate is a chemical compound with the chemical formula KNO3. It is an ionic salt of potassium ions K⁺ and nitrate ions NO3−, and is therefore an alkali metal nitrate. It occurs in nature as a mineral, niter. It is a source of nitrogen, from which it derives its name.

I hope this helps!

mg3n2 is known as magnesium nitride

explanation:

i don't think ke is an compound

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