The chemical reaction between hcl(aq)hcl(aq) and nh3(aq)nh3(aq) is represented above. a student combines equimolar amounts of hcl(aq)hcl(aq) and nh3(aq)nh3(aq), both solutions initially at 24°c24°c, in a coffee-cup calorimeter. the student observes that the mixture reaches a temperature of 28°c28°c. based on the experimental results, which of the following can be concluded about the reaction?
it is an endothermic process, because energy is released by the reaction and is gained by the reaction mixture.
a
it is an endothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.
b
it is an exothermic process, because energy is released by the reaction and is gained by the reaction mixture.
c
it is an exothermic process, because energy is absorbed by the reaction and is lost from the reaction mixture.
Answers: 1
Chemistry, 22.06.2019 12:30
Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?
Answers: 2
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
Answers: 1
Chemistry, 23.06.2019 02:00
Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. use the periodic table to find molar masses. how many moles of ethanol are present in the sample?
Answers: 2
The chemical reaction between hcl(aq)hcl(aq) and nh3(aq)nh3(aq) is represented above. a student comb...
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