100 grams vinegar and 5 grams baking soda are combined in a container & baking soda can react chemically with vinegar ->  a chemical reaction happens between baking soda and vinegar  a chemical reaction happens between baking soda and vinegar & the mass of the reactants of a chemical reaction equals to the products of the chemical reaction ->  the mass of baking soda and vinegar is equal to the product of the chemical reaction  gas is produced in the chemical reaction between baking soda and vinegar & gas is trapped in the container & if gases are released by a chemical reaction then the total mass of the product will be less than the total mass of the reactants ->  the mass of the final product of the baking soda and vinegar will not be less than the mass of the reactants  the mass of baking soda and vinegar is equal to the product of the chemical reaction & the mass of the final product of the baking soda and vinegar will not be less than the mass of the reactants ->  the mass of the final product of the baking soda and vinegar will be the same as that of baking soda and vinegar  100 grams plus 5 grams equals to 105 grams & baking soda is 5 grams & vinegar is 100 grams ->  the mass of vinegar and baking soda is 105 grams  the mass of the final product of the baking soda and vinegar will be the same as that of baking soda and vinegar & the mass of vinegar and baking soda is 105 grams -> the product of the chemical reaction will be 105 grams