R is higher / greater that Q because Q is a smaller atom therefore its nucleas attracts electrons strongly.
maurice.mutuku answered the question on September 17, 2019 at 05:23
- In order to determine the molar heat of neutralization of 1M potassium hydroxide, 200cm³ of 1M hydrochloric acid both at the same temperature were mixed...(Solved)
In order to determine the molar heat of neutralization of 1M potassium hydroxide, 200cm³ of 1M hydrochloric acid both at the same temperature were mixed and stirred continuously with a thermometer. The temperature of the resulting solution was recorded after every 30 seconds until the highest temperature of the solution was attained.
(a) (i) Why was it necessary to stir the mixture of the two solutions?
(ii) Write an ionic equation for the reaction.
(b) The initial temperature for both solution was 24.5°C and the highest temperature attained by the mixture was 30.9°C. Calculate the
(i) heat change for the reaction.
(Specific heat capacity of the solution is 
Density of the solution is 
The volume of KOH used was 200cm³.
(ii) molar heat of the neutralisation.
(c) If ammonium hydroxide was used instead of potassium hydroxide the heat of neutralization would be different from the one obtained in b(ii) above.
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(d) Draw an energy level diagram for the reaction between potassium hydroxide and hydrochloric acid.
Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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(i) Write an equation for the reaction between propan-l-ol and potassium metal.
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(iii) Identify the products A and B.
(iv) Name one catalyst used in Process II.
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Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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(ii) Explain your answer in a(i) above.
(b) (i) Identify the most reactive non-metal.
(ii) Explain your answer in b(i) above.
(c) Give the electronic configuration of element.
(i) S
(ii) Q
(d) Compare the atomic radius of P and R. Explain.
(e) The mass number of W is 40. Write down the composition of its nucleus.
(f) Write formula of oxides of P.
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Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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Study it and answer the questions that follow.(Solved)
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Study it and answer the questions that follow.
(a) Identify.
(i) Gas A
(ii) Gas B
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Date posted: September 16, 2019. Answers (1)
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State and explain the observation made if dilute sulphuric (VI) acid is added to the equilibrium mixture.
Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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12.5cm³ of 0.02M acidified potassium manganate...(Solved)
25cm³ of a solution of ammonium iron (II) sulphate (NH4)2 SO4. FeSO4 nH2O with concentration of 19.6g/l was titrated with
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Determine the value of n in the salt.
Date posted: September 16, 2019. Answers (1)
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Date posted: September 16, 2019. Answers (1)
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Determine the formula of the hydrocarbon given that...(Solved)
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Date posted: September 16, 2019. Answers (1)
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Mass of dish = 15.86g.
Mass of dish...(Solved)
The results of an experiment to determine the solubility of potassium chlorate in water at 30°C were as follows.
Mass of dish = 15.86g.
Mass of dish + saturated solution at 30°C = 26.8g.
Mass of dish + solid potassium chlorate after evaporation to dryness = 16.86g.
Calculate the mass of saturated solution containing 60g of water at 30°C.
Date posted: September 13, 2019. Answers (1)
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Date posted: September 13, 2019. Answers (1)
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On the same axis, sketch the graph when a catalyst is added and label all the essential parts.
Date posted: September 13, 2019. Answers (1)
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(i) 
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Date posted: September 13, 2019. Answers (1)
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Excess iron was allowed to rust in 2dm³ of most air and the volume of air remaining was measured at 1 atmospheric pressure each day.The results were as follows.
(i) Write an equation for the formation of rust.
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Date posted: September 13, 2019. Answers (1)
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A given sample of ink is a mixture of red dye, blue dye and orange dye. The blue dye is least absorbed than the rest and the red dye is most sticky.
(a) Complete the paper chromatogram below showing their separation.
(b) The above dyes are soluble in water. Describe how a pure sample of blue dye can be obtained.
(c) Name the solvent used in paper chromatography.
Date posted: September 13, 2019. Answers (1)