mass of the reactants must always equal the mass of the products.
However, please note that this law works only when the matter is not
approaching the speed of light. Once the mass goes faster it will
transform into forms of energy, which we will discuss in later chapters
(Law of Conservation of Energy (or First Law
Hence, in nuclear reactions seen in large astronomical objects
throughout the Universe this law may not conform.
In this lab, you will test this rule by performing several chemical
reactions and see if the end results are still the same mass. Key in
these experiments is that the system is closed, especially if gas
is being created. Measuring the mass precisely is also important, so
depending on the precision of your scales will depend on how you can
compare your data.
In this lab you will
look at different closed systems and find the mass of all the components
before and after. You will see for yourself that matter and mass is not
destroyed under normal conditions.