T2 = 273.22 K
john3 answered the question on October 4, 2017 at 11:48
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Give a reason why nitric (V) acid is stored in dark brown bottles.
(Solved)
Give a reason why nitric (V) acid is stored in dark brown bottles.
Date posted:
September 30, 2017
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Answers (1)
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Name the following processes (i) When anhydrous calcium chloride was left in an open beaker overnight a solution was formed (ii) When sodium carbonate decahydrate crystals are...
(Solved)
Name the following processes
i) When anhydrous calcium chloride was left in an open beaker
overnight a solution was formed.
ii) When sodium carbonate decahydrate crystals are left in an open beaker for some days it turned
into powder.
Date posted:
September 28, 2017
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Answers (1)
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Briefly explain how the calcium is separated from sodium in the down’s cell.
(Solved)
Briefly explain how the calcium is separated from sodium in the down’s cell.
Date posted:
September 28, 2017
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Answers (1)
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List and explain the physical properties of Sulphur
(Solved)
List and explain the physical properties of Sulphur
Date posted:
September 27, 2017
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Answers (1)
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Name the two allotropes of sulphur
(Solved)
Name the two allotropes of sulphur
Date posted:
September 26, 2017
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Answers (1)
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Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
(Solved)
Both graphite and molten sodium chloride conduct electricity,state how each of the substances conduct electricity?
Date posted:
September 26, 2017
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Answers (1)
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List five substances that undergo sublimation?
(Solved)
List five substances that undergo sublimation?
Date posted:
September 26, 2017
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Answers (1)
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An experiment was carried out to investigate the rate of reaction shown below
Sucrose ?Fructose + Glucose ...
(Solved)
An experiment was carried out to investigate the rate of reaction shown below
Sucrose →Fructose + Glucose
For the products fructose and glucose to be formed, it was found that substance K was to be added and the temperature maintained at 370C. When another substance L was added, the reaction slowed down and eventually stopped
a) Suggest the identify of substances K and L
b) Other than temperature state three ways by which the rate of reaction could be increased
c) Explain how substance L slowed down the reaction
Date posted:
September 25, 2017
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Answers (1)
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State the uses of water in frasch process
(Solved)
State uses of water in frasch process
Date posted:
September 24, 2017
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Answers (1)
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State two chemical tests for the presence of water
(Solved)
State two chemical tests for the presence of water
Date posted:
September 19, 2017
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Answers (1)
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Sulphur is extracted from underground deposits by frasch process. State two physical properties of Sulphur that makes it possible to be extracted through this process.
(Solved)
Sulphur is extracted from underground deposits by frasch process. State two physical properties of Sulphur that makes it possible to be extracted through this process.
Date posted:
September 19, 2017
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Answers (1)
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Name a suitable drying agent for hydrogen chloride gas
(Solved)
Name a suitable drying agent for hydrogen chloride gas
Date posted:
September 19, 2017
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Answers (1)
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Highlight the steps followed when lighting a Bunsen burner
(Solved)
Highlight the steps followed when lighting a Bunsen burner
Date posted:
September 18, 2017
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Answers (1)
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5.0g of calcium carbonate were allowed to react with 25cm3 of 1.0M hydrochloric acid until there was no further reaction. Calculate the mass of calcium...
(Solved)
5.0g of calcium carbonate were allowed to react with 25cm3 of 1.0M hydrochloric acid until
there was no further reaction. Calculate the mass of calcium carbonate that remained
unreacted(Ca = 40, C = 12, O = 16).
Date posted:
September 18, 2017
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Answers (1)
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Dry carbon (II) oxide gas was passed over heated lead (II) oxide.
(a) Write an equation for the reaction
(b) Give one industrial application of the above...
(Solved)
Dry carbon (II) oxide gas was passed over heated lead (II) oxide.
(a) Write an equation for the reaction
(b) Give one industrial application of the above reaction.
(c) Name another gas that can be used in the above reaction.
Date posted:
September 18, 2017
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Answers (1)
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a)Why is the percentage of carbon(IV)oxide in the atmosphere fairly constant? (b)Calculate the volume of carbon(IV)oxide in 8,000 m3 of air contained in a hall.
(Solved)
a)Why is the percentage of carbon(IV)oxide in the atmosphere fairly constant?
b)Calculate the volume of carbon(IV)oxide in 8,000 m3 of air contained in a
Date posted:
September 18, 2017
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Answers (1)
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Which two elements will react more vigorously with each other between fluorine, neon, sodium, magnesium?
(Solved)
Which two elements will react more vigorously with each other between fluorine, neon, sodium, magnesium?
Date posted:
September 17, 2017
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Answers (1)
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a)Given that the mass of copper obtained in an o extraction was 210kg, determine the percentage purity of the ore used (copper pyrites) if 810kg...
(Solved)
a)Given that the mass of copper obtained in an o extraction was 210kg, determine the percentage purity of the ore used (copper pyrites) if 810kg of it was fed to the 1st roasting furnace. (Cu = 63.5, Fe = 56, S = 32.0)
b)Give 2 effects that the process above could have on the environment.
Date posted:
September 14, 2017
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Answers (1)
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a)Using ionic equation explain how sodium carbonate can be used to soften hard water.(b)Other than softening of hard water give 2 other uses of sodium...
(Solved)
a)Using ionic equation explain how sodium carbonate can be used to soften hard water.
b)Other than softening of hard water give 2 other uses of sodium carbonate.
Date posted:
September 14, 2017
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Answers (1)
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Predict the pH of the oxide of sulphur in water.
(Solved)
Predict the pH of the oxide of sulphur in water.
Date posted:
September 14, 2017
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Answers (1)