chemistry matter remaining

Question

When added to a sealed flask and heated, 6.0g of carbon and 16.0g of oxygen react to form 22.0g of carbon dioxide. How much Mayer remains in the sealed flask after the reaction has occurred?

 

-22.0g

-44.0g

-16.0g 

-0g

 

Answer 1

I'm not sure what you mean by "Mayer", but the law of conservation of mass says that the total mass that you begin with will be equal to the total mass you finish with.  In this reaction you begin with 6.0g of carbon and 16.0g of oxygen, which is a total of 22.0g.  After the reaction you have 22.0g of carbon dioxide, so none of the reactants are left over.  You start with 22.0g, you must end with 22.0g.