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? Leaching of minerals in soil;
? Erosion of stone work on buildings;
? Corrosion of metallic structures;
? Irritation of respiratory systems thus worsening respiratory illnesses;
? Death of plants as a result of defoliation (falling of leaves);
? Destruction of aquatic life in acidified lakes;
? Stunted plant growth due to chlorosis;
Kavungya answered the question on March 5, 2019 at 12:23
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Using a table show the comparison between rhombic and monoclinic sulphur.
Date posted: March 5, 2019. Answers (1)
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State and explain three pollution effects of Nitrogen compounds.
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Date posted: March 5, 2019. Answers (1)
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Date posted: March 5, 2019. Answers (1)
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Date posted: March 5, 2019. Answers (1)
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Date posted: March 5, 2019. Answers (1)
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Date posted: March 5, 2019. Answers (1)
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Explain the action of heat on nitrates.
Date posted: March 5, 2019. Answers (1)
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Write a summary on comparison between oxides of nitrogen.
Date posted: March 5, 2019. Answers (1)
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Describe one method used in preparation of Nitrogen.
Date posted: March 5, 2019. Answers (1)
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State the observation made in the combustion tube during preparation of ammonia
Date posted: February 21, 2019. Answers (1)
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(Solved)
Using an energy level diagram calculate the ΔHs of ammonium chloride crystals given that.
ΔHf of NH3 (aq) = -80.54kJ mole-1
ΔHf of HCl (aq) = -164.46kJ mole-1
ΔHf of NH4Cl (aq) = -261.7483kJ mole-1
ΔHs of NH4Cl (aq) = -16.8517kJ mole-1
Date posted: February 20, 2019. Answers (1)
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Calculate ?H for the reaction;
CuSO4(aq) + 5H2O-> CuSO4 .5H2O (aq) ?H=-77.4 kJmole-1(Solved)
Given the following information below:
Calculate ΔH for the reaction;
CuSO4(aq) + 5H2O-> CuSO4 .5H2O (aq) ΔH=-77.4 kJmole-1
Date posted: February 20, 2019. Answers (1)
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Calculate the molar enthalpy of formation of carbon(II)oxide (CO) given : ΔHᶿc of carbon-graphite = -393.5kJmole-1, ΔHᶿc of carbon(II)oxide (CO)= -283 kJmole-1
Date posted: February 20, 2019. Answers (1)
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Calculate the molar enthalpy of formation of methane (CH4) given that ΔHᶿc of carbon-graphite is -393.5kJmole-1,Hydrogen is -285.7 kJmole-1 and that of methane is 890 kJmole-1
Date posted: February 20, 2019. Answers (1)
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Place 100cm3 of distilled water into a plastic beaker/calorimeter. Determine its temperature and record it at time =0 in table I below.
Answer the questions below
Date posted: February 20, 2019. Answers (1)
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Place 50cm3 of 2M hydrochloric acid into a calorimeter/200cm3 plastic beaker wrapped in cotton wool/tissue paper. Record its temperature T1.Using a clean measuring cylinder, measure another 50cm3 of 2M sodium hydroxide. Rinse the bulb of the thermometer in distilled water. Determine the temperature of the sodium hydroxide T2.Average T2 andT1 to get the initial temperature of the mixture
T3.
Carefully add all the alkali into the calorimeter/200cm3 plastic beaker wrapped in cotton wool/tissue paper containing the acid. Stir vigorously the mixture with the thermometer.
Determine the highest temperature change to the nearest 0.5oC T4 as the final temperature of the mixture. Repeat the experiment to complete table 1.
Answer the questions below
Date posted: February 20, 2019. Answers (1)
- Place 20cm3 of 0.2M copper(II)sulphate (VI) solution into a calorimeter/50cm3 of plastic beaker wrapped in cotton wool/tissue paper.
Record its temperature at time T= 0.
Stir the...(Solved)
Place 20cm3 of 0.2M copper(II)sulphate (VI) solution into a calorimeter/50cm3 of plastic beaker wrapped in cotton wool/tissue paper.
Record its temperature at time T= 0.
Stir the solution with the thermometer carefully and continue recording the temperature after every 30 seconds .
Place all the (1.5g) Zinc powder provided.
Stir the solution with the thermometer carefully and continue recording the temperature after every 30 seconds for five minutes.
Determine the highest temperature change to the nearest 0.5oC
Answer the questions below
Date posted: February 20, 2019. Answers (1)
- Determine the specific heat capacity of a solution of a solution mixture of
50.0cm3 of 2M potassium hydroxide neutralizing 50.0cm3 of 2M nitric(V)
acid if a 13.25oC...(Solved)
Determine the specific heat capacity of a solution of a solution mixture of
50.0cm3 of 2M potassium hydroxide neutralizing 50.0cm3 of 2M nitric(V)
acid if a 13.25oC rise in temperature is recorded.(1mole of potassium hydroxide produce 55.4kJ of energy)
Date posted: February 19, 2019. Answers (1)
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The molar enthalpy of neutralization was experimentary shown to be 51.5kJ per mole of 0.5M hydrochloric acid and 0.5M sodium hydroxide. If the volume of sodium hydroxide was 20cm3. what was the volume of hydrochloric acid used if the reaction produced a 5.0oC rise in temperature?
Date posted: February 19, 2019. Answers (1)