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. 1Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygengas, 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)
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