The specific heat capacity of arsenic is 0.33 J °C−1 g−1. (a) Calculate the energy required to raise the temperature of 201.4 g As from 273 K to 298 K. J (b) Calculate the energy required to raise the temperature of 1.0 mole of As by 1.0°C (called the molar heat capacity of arsenic). J °C−1 mol−1 (c) It takes 1.26 kJ of energy to heat a sample of pure arsenic from 13.2°C to 15.2°C. Calculate the mass of the sample of arsenic. g
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Compare and contrast physical changes with chemical changes.
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Part b: study of equilibrium on solubility: mg(oh)2(s) ⇌ mg2+(aq) + 2 oh–(aq) cloudy clear (pink) 7. a. b. 8. a. b. 9. 10. 11. 12. when adding concentrated hydrochloric acid, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 7a. you should indicate which ion was added to or removed from the equilibrium mixture. when adding edta, how did the appearance of the equilibrium mixture change? the change in appearance indicated a shift in the point of equilibrium. in which direction did the equilibrium shift? (l) left (r) right explain your answer to question 8a. you should indicate which ion was added to or removed from the equilibrium mixture. upon heating in which direction is the equilibrium shifting? upon cooling in which direction is the equilibrium shifting? is the forward reaction a. endothermic explain your answers to questions 9, 10, and 11. (l) left (r) right (l) left (r) right b. exothermic
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Chemistry, 22.06.2019 12:30
Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)
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The specific heat capacity of arsenic is 0.33 J °C−1 g−1. (a) Calculate the energy required to raise...
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