VINTAGE ANTIQUE JEWELRY

Please help!! I need help with a chemistry problem. I need help to change word equations into formula equation?

Here is the problem: Silver oxide (arrow delta sign ) silver+oxygen. The answer the book gives is 2 Ag subscript 2 O (arrow delta sign) 4 Ag + O subscript 2. for the formula equation. I do not understand how to get the coefficients and the subscripts. I hope someone can enlighten me how to get the numbers into the equation. Thank you very much for your help!!

Silver has an oxidation number of +1 and oxygen has one of -2 so you need two silver atoms to balance the charge of the one oxygen

On the other side of the equation, oxygen when alone always occurs in a gaseous state and is in the form O subscript 2 for oxygen gas. For a balanced equation you need two silver oxides as the other side of the equation has 2 oxygen. This makes 4 silver molecules on the other side of the equation

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