According to the law of the conservatives of mass, if the products o a reaction have a mass of 64.0 g, then the total mass of the reactants:
To answer this question, you need to understand the law of conservation of mass. The law states that mass is neither created nor destroyed in a chemical reaction. This means that the total mass of the reactants must be equal to the total mass of the products.
In this case, if the products of a reaction have a mass of 64.0 g, then the total mass of the reactants must also be equal to 64.0 g.
To find the mass of the reactants, you need to know the specific reaction involved. The balanced chemical equation for the reaction will give you the stoichiometric coefficients, which represent the ratio of moles of reactants to moles of products. You can use these coefficients to determine the masses of the reactants.
For example, if the reaction is represented by the equation:
aA + bB → cC + dD
The coefficients a, b, c, and d represent the number of moles of each substance in the reaction. To determine the mass ratio, you would multiply the coefficients by the molar mass of each substance. Then, you can set up an equation to solve for the unknown mass of the reactants.
Keep in mind that the law of conservation of mass holds true for any given chemical reaction and is a fundamental concept in chemistry.