Chemistry Homework Assistance

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C Probot Unit 1 Question 12 of 27 What is the change in entropy (Delta S) when sodium chloride dissolves in water? A. Greater than 0 B. Less than 0 C. Equal to Delta H D. Equal to 0

L 60. Pertaining to halogeno-alkanes, which of the following propositions is correct? A. They show a reactivity of the order: RClgt RBrgt RI B. They obey the general formula C_(n)H_(2n+1)X C. The can be prepared from a HX and alcohol D. They produce a nitrile upon reflux with KCN in alcohol E. None of the above 61. The carbonyl bond in aldehydes and ketones consist of: A. Two sigma bonds B. One sigma and one pi bond C. Two pi bonds D. Sigma bonds E. None of the above 62. Which of the following substances would liberate nitrogen gas when treated with nitric acid? A NH2CH2COOH B. CH3CONH2 C. CH3CH2NH2 D. CH3COCl E. None of the above

SOLVED PROBLEM 2. Calculate the bond energy of HCl given that H-H bond energy is 433 kJ mol^-1 C1-Clbond 242kJmol^-1 and Delta H_(f) for HCl is -91kJmol^-1

2. Discuss how you can help your learners to understand methods and chemical processes used in the manufacture of nitrogen fertilizer (25 min) 1. List chemical industries that you k 3. Discuss the properties formulations classifications, and the raw materials uses the production of required products (20 min) 4. Explain how nitrogen fertilizers provide the essential nutrient for plant growth min) 5. Discuss the role of nitrifying bacteria in the reaction of nitrogen-based fertiliz min) 6. Watch the video at https://www .youtube .com/watch?v =eFlhYS- tpY , share to. observation to your peers. (20 min) 7. What technologies can you use to teach fertilizer concepts? (20 min)

Using a schematic diagram ,illustrate the correct sequence of urban water treatment. (a) Briefly explain the importance of a laboratory coat, safety goggles, gloves and protective masks as safety equipment in the Chemistry laboratory.