Would "A" be an example of a pure substance or a mixture? Pure Substance

Mixture

What is A

I’m not sure what your trying to say here.. can you clarify again?

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !