What's More Answer the following and write your answers on a separate sheet of paper. 1. Calculate the oxidation number for iodine in each of the following compounds: (a) iodine, I2 (b) potassium iodide, KI (c) silver periodate, AgIO4 (d) zinc iodate, Zn(IO3)2 2. Calculate the oxidation number for chlorine in each of the following ions: (a) hypochlorite ion, ClO- (b) chlorite ion, clO2- (c) chlorate ion, ClO3- (d) perchlorate ion, ClO4- City 3. A redox reaction occurs when molten aluminum reacts with iron (III) oxide. Fe,O3() + 2 Al() 2 Fe(l) + Al,O3) Indicate each of the following for the above redox reaction: (a) substance oxidized (b) substance reduced (c) oxidizing agent (d) reducing agent 4. Balance the following redox equation by the oxidation number method: Cl2Os(g + CO1g) Claig + CO218) Answer: II | || I|

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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.