CHEM-121_Written Assignment 4 - Thomas Edison State College General Chemistry I with Labs(CHE-121 Section no OL009 Semester and year Feb2015 Written

# CHEM-121_Written Assignment 4 - Thomas Edison State College...

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Thomas Edison State College General Chemistry I with Labs (CHE-121) Section no.: OL009 Semester and year: Feb2015 Written Assignment 4: Chemical Reactions Answer all assigned questions and problems, and show all work. 1 Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygen gas, and use it to explain the following terms: (b) chemical reaction, (c) reactant, (d) product. (12 points) a 2H 2 + O 2 2H 2 O b Chemical reaction: hydrogen gas and oxygen are burned to form water c Reactant H 2 and O 2 d Product: H 2 O 2 Balance the following equations: (18 points) a 2C + O 2 2CO b 2CO + O 2 2CO 2 c 2Na + 2H 2 O H 2 + 2NaOH d Zn + 2HCl ZnCl 2 + H 2 e 2NaOH + H 2 SO 4 2H 2 O + Na 2 SO 4 f 2NH 3 + 3CuO 3Cu + N 2 + 3H 2 O 3 Calculate the mass in grams of iodine (I 2 ) that will react completely with 20.4 g of aluminum (Al) to form aluminum iodide (AlI 3 ). (5 points) (Reference: Chang 3.47) 3I 2 + 2Al → 2AlI 3 (2 x 27.0) g of Al react completely with [3 x (2 x 126.9)] g of I 2 20.4 g of Al will react completely with (761.4 x 20.4) / 54.0 = 287.64 = 288 g of I 2 4 The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust, and other sources is about 26 million tons. The equation for the reaction is S(s) + O 2 (g) SO 2 (g) How much sulfur (in tons), present in the original materials, would result in that quantity of SO 2 ? (5 points) (Reference: Chang 3.69)
32.1 g of S reacts with O 2 will result of 64.1 g of SO 2 26 x 10 6

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