Chemistry

Chemistry

Problem

During the decomposition of substance B, the following concentrations were obtained: Time (s) | 15 | 20 | 25 Concentration (M) | 0.840 | 0.720 | 0.615 Using the data at 15 s and 25 s to approximate the slope of the tangent at 20 s, what is the instantaneous rate of disappearance of B (expressed as a positive value) at t=20 st=20\,\text{s}? a) 0.011 M s−10.011\,\text{M\,s}^{-1} b) 0.0023 M s−10.0023\,\text{M\,s}^{-1} c) 0.0225 M s−10.0225\,\text{M\,s}^{-1} d) 0.021 M s−10.021\,\text{M\,s}^{-1}

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