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1.) There is no change in the total mass of the substances reacting...

 

1.) There is no change in the total mass of the substances reacting in a balanced chemical reaction.

 True

 False

 

2.) In a chemical reaction, no material is lost or gained as original substances are changed to new substances.

 True

 False

 

3.) Calculate the total mass of the reactants and the products for the following balanced chemical equation.

                     C _(s) + O_{2 (g)} ---> CO_{2 (g)}

_a._ g of reactants = _b._ g of products

a. =

b. =

 

4.) If a reaction resulted in making 25 grams of product, what must have been the mass of the reactants?

 

5.) If the total mass of reactants for a certain reaction was 33 grams, and all of the reactants were converted to products, what must be the total mass, in grams, of the products?