Question 1118552
Nice description and the data points  (t,C) can be plotted.  Choose whichever data you believe would give best slope.   Does the result match the 4.55 found in the given equation?


The data in Excel lets you see a plotting of points approximately close to a line.  The first and last point seem to be good fit on their own for this line.


Their slope:    {{{(229.6-196.8)/7=32.8/7=4.69}}}


Decide if this was good enough.