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i) E- Atomic radius decrease across a period because E has the highest nuclear attraction hence electrons are attracted strongly.
ii) Group (IV), Period 4
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iii) Used in advertising sign lamps
iv)$ 2CNO_3(s) \rightarrow 2CNO_2(s) + O_2(g) $
johnmulu answered the question on April 12, 2017 at 11:44
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The set-up below was used to prepare hydrogen gas
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b) State two industrial uses of hydrogen gas
Date posted: April 12, 2017. Answers (1)
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The set up shown below was used to investigate a property of hydrogen gas
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Date posted: April 12, 2017. Answers (1)
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The graph below shows the relationship between pressure and temperature of a gas in a fixed volume container.
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b) Using kinetic theory, explain the relationship shown in the graph.
Date posted: April 12, 2017. Answers (1)
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The graph below shows the behavior of a fixed mass of a gas at constant temperature.
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Date posted: April 12, 2017. Answers (1)
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(Solved)
The set up below was used to investigate some properties of two gases M and N
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Date posted: April 12, 2017. Answers (1)
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Study the set-up below and answer the questions that follow.
What observation would be made in the tube?
Date posted: April 12, 2017. Answers (1)
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In an experiment to study the diffusion of gases, a student set up the apparatus shown in diagram 1. After sometimes the student noticed a change in the water level as shown in the diagram.
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Date posted: April 12, 2017. Answers (1)
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A mixture containing equal volumes of hydrogen and carbon (IV) oxide was introduced at one end of a tube as shown below.
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Date posted: April 12, 2017. Answers (1)
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Study the flow chart below and answer the questions that follow.
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Date posted: April 12, 2017. Answers (1)
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Date posted: April 12, 2017. Answers (1)
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The diagram below represents part of a set-up used to prepare and collect gas T.
a) Name two reagents that are reacted to produce both carbon (IV) oxide and carbon (II) oxide
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Date posted: April 12, 2017. Answers (1)
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Date posted: April 12, 2017. Answers (1)
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The set-up below was used to collect gas F, produced by the reaction between water and calcium metal
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Date posted: April 12, 2017. Answers (1)
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Carbon (II) oxide was passed over heated iron (III) oxide as shown in the diagram below.
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b) Write the equation for the reaction which takes place in tube P.
Date posted: April 12, 2017. Answers (1)
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Date posted: April 12, 2017. Answers (1)
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The apparatus shown below was used to investigate the effect of carbon (II) oxide on copper (II) oxide.
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Date posted: April 12, 2017. Answers (1)
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In an experiment, carbon (IV) oxide gas was passed over heated charcoal and the gas produced collected as shown in the diagram below.
i) Write an equation for the reaction that took place in the combustion tube.
ii) Name another substance that can be used instead of sodium hydroxide
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Date posted: April 10, 2017. Answers (1)
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The following diagrams show the structures of two allotropes of carbon. Study them and answer the questions that follow.
Allotrope M
(i) Name allotrope M and N
(ii) Give one use of N
(iii) Which allotrope conduct electricity? Explain.
Date posted: April 10, 2017. Answers (1)
- Study the information in the table below and answer the questions that follow.
(The letters do not represent the actual symbols of the elements.)
(Solved)
Study the information in the table below and answer the questions that follow.
(The letters do not represent the actual symbols of the elements.)
Select an element which:
a) Is likely to be in group II of the periodic table.
b) Could be used to make electric cables
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Date posted: April 10, 2017. Answers (1)
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The simplified flow chart shows some of the steps in the manufacture of sodium carbonate by the Solvay process.
a) Identify substance L.
b) Name the process taking place in step II.
c) Write an equation for the reaction, which takes place in step III.
Date posted: April 10, 2017. Answers (1)