It is yellow in colour
It is solid at room temperature
Wincate 1 answered the question on September 19, 2017 at 13:33
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Name a suitable drying agent for hydrogen chloride gas
Date posted: September 19, 2017. Answers (1)
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a) Name chief ore from which iron is extracted from.
b) An ore is suspected to...(Solved)
Iron is extracted from its ore by the blast furnace process
a) Name chief ore from which iron is extracted from.
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Date posted: September 18, 2017. Answers (1)
- Explain why hard water flowing in lead pipes may be safer for drinking than soft water
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Date posted: September 18, 2017. Answers (1)
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Date posted: September 18, 2017. Answers (1)
- In an experiment to determine the solubility in water at 300c, the following results were obtained.
Mass of empty evaporating dish = 26.2g
Mass of evaporating dish...(Solved)
In an experiment to determine the solubility in water at 300c, the following results were obtained.
Mass of empty evaporating dish = 26.2g
Mass of evaporating dish + saturated solution = 42.4g.
Mass of evaporating dish + dry solid Y = 30.4g
Use this data to calculate the solubility of Y at 300C.
Date posted: September 18, 2017. Answers (1)
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Date posted: September 18, 2017. Answers (1)
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a) State and explain the observations made when chlorine water is exposed to light after 24 hours.
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Date posted: September 18, 2017. Answers (1)
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Date posted: September 18, 2017. Answers (1)
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isotope is 25 days.
(a) What is meant by...(Solved)
M grammes of a radioactive isotope decayed to 5 grammes in 100 days. The half life of the
isotope is 25 days.
What is meant by half life
Date posted: September 18, 2017. Answers (1)
- A student burnt magnesium ribbon in a gas jar full of sulphur (IV) oxide gas.
(i) State two observations made in the gas jar
(ii) Write an...(Solved)
A student burnt magnesium ribbon in a gas jar full of sulphur (IV) oxide gas.
(i) State two observations made in the gas jar
(ii) Write an equation for the reaction that took place
Date posted: September 18, 2017. Answers (1)
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realized that it did not lather easily.
(i) Name the...(Solved)
A student fetched water from a river in a limestone area. He used it for washing and
realized that it did not lather easily.
(i) Name the two ions that prevent lathering
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Date posted: September 18, 2017. Answers (1)
- 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. Answers (1)
- Study the following equilibrium equation
2X2(g) + Y2(g)<------> 2X2Y(g) H = -197kJ/mol
Suggest two ways of increasing the yield of X2Y(Solved)
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2X2(g) + Y2(g)<------> 2X2Y(g) H = -197kJ/mol
Suggest two ways of increasing the yield of X2Y
Date posted: September 18, 2017. Answers (1)
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Give two physical properties of hydrogen gas
Date posted: September 18, 2017. Answers (1)
- (a) Proteins are obtained from amino acids monomers. Complete the equation below to show the polymer formed.
H2NCH2COOH + H2NCHCH3COOH ---------->H2O +---------
b)Name the type of polymerization...(Solved)
(a) Proteins are obtained from amino acids monomers. Complete the equation below to show the polymer formed.
H2NCH2COOH + H2NCHCH3COOH ---------->H2O +---------
b)Name the type of polymerization shown above
Date posted: September 18, 2017. Answers (1)
- 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. Answers (1)