A 50,000 g septic tank reading reports that methane gas bubbles are present with a concentration of 17 ppm

Explanation:

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In this case, according to the given information for the parts per million of methane in this solution, it is possible for us to first write the equation for this unit of concentration as shown below:

In such a way, since the septic tank has a mass of 50,000 g, the mass of methane into it is calculated as shown below:

Now, we plug in the numbers to obtain:

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chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.