What best explains how a plot of concentration vs time for a reactant of a chemical reaction can be used to determine the instantaneous rate of a reaction at time equals 300 s?

1) Find time = 300 s on the curve.

2) Draw a tangent line crossing the point at time = 300 s on the curve.

3) Identify two points on the tangent line and use them to find the slope of the line.

4) The slope of the line is the instantaneous reaction rate in M/s.
1) Find time = 150 s on the curve.

2) Draw a line tangent to the point time = 150 s on the curve.

3) Identify two points on the tangent line and use them to find the slope of the line.

4) The slope of the line is the instantaneous rate in M/s.