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Chemistry reactant

Does anybody know how to find the amount of each reactant used when only given the product.

This is one of the Q’s:
A compound of nitrogen, and oxygen ,A, was formed by reacting 20 cm³ of nitrogen gas with 10 cm³ of oxygen.Write an equation for this reaction

I know the product formulae is N2O3

Reply 1

lprid

Original post by ihaveno name

If you're just writing a chemical equation, you know that nitrogen gas exists as N₂and oxygen gas exists as O₂ and then you know your product is N₂O₃

N₂+ O₂-> N₂O₃

So then you just need to balance the equation:

N₂+ 1.5O₂-> N₂O₃or
2N₂+ 3O₂-> 2N₂O₃