25.00 ml of 0.500 M Na2CO3 at 20.00 ℃ is mixed with 29.00 ml of 0.600 M HCl, in a coffee-cup calorimeter at 20.00 ℃. After stirring and allowing the reaction to go to completion, the final temperature is 26.50 ℃. As the gaseous CO2 forms from the reaction under constant atmospheric pressure of 0.988 atm, the volume changes by 2.6 L per 1 mol of CO2. Assume the final solution has the density of 0.982 g mL and specific heat capacity of 4.184 J g • ℃ . Calculate the change in internal energy ΔE, of the reaction (in kJ mol).
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Chemistry, 22.06.2019 12:30
Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17
Answers: 1
Chemistry, 22.06.2019 21:50
Answer the questions about this reaction: nai(aq) + cl2(g) → nacl(aq) + i2(g) write the oxidation and reduction half-reactions: oxidation half-reaction: reduction half-reaction: based on the table of relative strengths of oxidizing and reducing agents (b-18), would these reactants form these products? write the balanced equation: answer options: a. 0/na -> +1/na+1e- b. nai(aq) + cl2(g) → nacl(aq) + i2(g) c. +1/na+1e- -> 0 /na d. -1/2i -> 0/i2+2e- e. no f. 4nai(aq) + cl2(g) → 4nacl(aq) + i2(g) g. 2nai(aq) + cl2(g) → 2nacl(aq) + i2(g) h. 4nai(aq) + 2cl2(g) → 4nacl(aq) + 2i2(g) i. nai(aq) + cl2(g) → nacl(aq) + i2(g) j. 0/cl2+2e -> -1/2cl- k. yes
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Chemistry, 23.06.2019 01:00
Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.
Answers: 2
Chemistry, 23.06.2019 09:00
The vapor pressure of water at 25.0°c is 23.8 torr. determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.0 g of water to change the vapor pressure to 22.8 torr.
Answers: 1
25.00 ml of 0.500 M Na2CO3 at 20.00 ℃ is mixed with 29.00 ml of 0.600 M HCl, in a coffee-cup calorim...
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