a) Z
b) Z is denser than K hence settles at the bottom.
maurice.mutuku answered the question on September 25, 2019 at 08:56
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The table below is a part of the periodic table. The letters are not the actual symbols of the element. Study it and answer the questions that follow.
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b) How do the ionic radius of T and S compare? Explain.
Date posted: September 25, 2019. Answers (1)
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Date posted: September 25, 2019. Answers (1)
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a) Write down the...(Solved)
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a) Write down the equation at the cathode.
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Date posted: September 25, 2019. Answers (1)
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a) Identify solid M.
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Date posted: September 25, 2019. Answers (1)
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c) Write the equation between substance B to form substance C.
Date posted: September 25, 2019. Answers (1)
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a) Give the type of structure and bonding that is present in substance A.
b) Which substance is likely to be sodium chloride. Explain.
c) Which one of the substance is likely to be plastic?
i) Explain why the substance you have given in (c) above behaves in the way it does
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Date posted: September 25, 2019. Answers (1)
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A student used the set-up shown in the diagram below in order to study the reactions of some metals with steam. The experiment was carried out for ten minutes.
a) What observation would be made if gas H was ignited.
b) When the experiment was repeated using lead powder instead of Beryllium very little of gas H was obtained. Give a reason for this observation.
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Date posted: September 25, 2019. Answers (1)
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Identify
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ii) Solution R
iii) Solution Q
Date posted: September 25, 2019. Answers (1)
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Date posted: September 25, 2019. Answers (1)
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(Na = 23, S = 32, O = 16)(Solved)
A compound contains 29.1% sodium, 40.5% sulphur and the rest is oxygen. Find the empirical formulae.
(Na = 23, S = 32, O = 16)
Date posted: September 25, 2019. Answers (1)
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Date posted: September 25, 2019. Answers (1)
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Date posted: September 25, 2019. Answers (1)
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i) Temperature is raised.
ii) Pressure is changed.(Solved)
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Explain what happens to the position of the equilibrium when:
i) Temperature is raised.
ii) Pressure is changed.
Date posted: September 25, 2019. Answers (1)
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Date posted: September 25, 2019. Answers (1)
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(i) Identify the bonds labelled M and N
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Date posted: September 25, 2019. Answers (1)
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When solid M is dissolved in water, it dissolves to form a blue solution. Addition of ammonia solution forms a blue precipitate which dissolves in excess to form a deep blue solution. Write the formula and name of the ion responsible for the deep blue solution.
Date posted: September 25, 2019. Answers (1)
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Determine...(Solved)
On combustion of 0.5g of an organic compound P (containing only carbon, hydrogen and oxygen),0.733g of carbon (IV) oxide and 0.3g of water were produced.
Determine the empirical formula of P.
Date posted: September 25, 2019. Answers (1)
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Radioactive polonium -216 decays as shown below.
(i) Find the value of M and N.
(ii) If after 112 days 
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Date posted: September 25, 2019. Answers (1)
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Explain.(Solved)
Zinc metal can be used in the laboratory to prepare hydrogen gas from an appropriate mineral acid while copper metal cannot.
Explain.
Date posted: September 24, 2019. Answers (1)
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Date posted: September 24, 2019. Answers (1)