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Lead sulphate and barium sulphate
Enockjakano answered the question on January 7, 2019 at 03:53
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Explain why bromine is a liquid at room temperature while chlorine is a gas
Date posted: January 3, 2019. Answers (1)
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Date posted: January 2, 2019. Answers (1)
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In an experiment a piece of magnesium ribbon was cleaned with steel wool 2.4g of the clean ribbon was placed in a crucible and completely burnt in oxygen.after cooling the product weighted 4.0g.
(a)explain why it was necessary to clean the magnesium ribbon?
(b)what observation was made in the crucible after burning?
(c)why was there an increase in mass?
(d)write the equation for reaction which took place in the crucible?
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Date posted: December 30, 2018. Answers (1)
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A student crushed the seeds and then added propane instead of water to extract oil from castor oil seeds. Why did he use propane instead of water and why were the seeds first crushed?
Date posted: December 26, 2018. Answers (1)
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Explain what is observed when ammonia gas is bubbled into copper sulphate solution till in excess
Date posted: December 20, 2018. Answers (1)
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Outline the physical properties of oxygen gas.
Date posted: December 20, 2018. Answers (1)
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A hydrocarbon consist of 92.3% carbon. Its molecular mass is 26. Calculate its molecular formula.
Date posted: December 16, 2018. Answers (1)
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What happens when ammonium chloride is heated?
Date posted: December 12, 2018. Answers (1)
- Crystals of sodium carbonate decahydrate were exposed to air for about four days
1. State what was observed
2. Name the process that took place
3....(Solved)
Crystals of sodium carbonate decahydrate were exposed to air for about four days
1. State what was observed
2. Name the process that took place
3. Write an equation for the reaction that occurred
Date posted: December 11, 2018. Answers (1)
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State the uses of ammonia.
Date posted: December 7, 2018. Answers (1)
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Name the type of bond and structure formed between the reaction of boron and fluorine.
Date posted: December 6, 2018. Answers (1)
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When a few drops of potassium permanganate are added to an aqueous solution of ferrous sulphate, solution turns brown. On the other hand, when the test is repeated using sodium molybdate instead of potassium permanganate no similar colour change is observed.
Date posted: November 29, 2018. Answers (1)
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Date posted: November 28, 2018. Answers (1)
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Define the term soil acidity as studied in soil chemistry.
Date posted: November 27, 2018. Answers (1)
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Date posted: November 19, 2018. Answers (1)
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Date posted: November 17, 2018. Answers (1)
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Date posted: November 16, 2018. Answers (1)
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Explain why the ionic radius of potassium is greater than that of sodium.
Date posted: November 14, 2018. Answers (1)
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What is ionization energy?
Date posted: November 9, 2018. Answers (1)