Consider the following cell reaction at 25 °C. Al(s) + Cr3*(aq) A13+(aq) + Cr(s) [Aš+] = 2.27 x 1o-6 M, [Cr3+] = 1.15 M. The standard potential of this cell, E°cell, is +0.92 V. a. Calculate n QUESTION 19 b. Calculate Ecell QUESTION 20 c. If the potential of the cell is +0.81 V and [AI3*] = 1.25 M, what is [Cr3*] in molarity?

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.