Julie mixes 40g (grams) of unknown X with 20g of unknown Y, how many grams of products will be produced and why?

To determine the amount of product produced, we need to know the chemical reaction between unknown substances X and Y. The reaction equation can provide information about the stoichiometry, which refers to the molar ratios between the reactants and products.

Once we have the balanced chemical equation, we can calculate the amount of product formed using the concept of stoichiometry. The coefficients in the balanced equation represent the mole ratios between the reactants and products.

Without the specific reaction between X and Y, we cannot provide a direct answer to the exact amount of product produced.

If you have the balanced equation for the reaction, please provide it, and I can help you calculate the grams of product formed.