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(a) 1- Sulphur / oxygen
2. Sulphur / oxygen
4- Oleum
6- Nitrogen
9 – Ammonium sulphate
8 – Nitrogen (IV) oxide
(b) – Temperature 450- 5000C
- Pressure of about 2-3 atoms
- Catalyst – Vanadium (V) oxide (V2O5)
(c) 9:- 2NH3(g) + H2 SO4 (l) -----> (NH4)2 SO4(s)
7:- NH3(g) + 5O2(g) ---------> 4NO(g) + 6H2O(l)
sharon kalunda answered the question on May 16, 2019 at 09:51
- The table below shows the atomic numbers of some elements represented by letter J to Q ( letters
not their actual symbols). Study and answer the...(Solved)
The table below shows the atomic numbers of some elements represented by letter J to Q ( letters
not their actual symbols). Study and answer the questions that follow.
a) Write the electronic configuration of
(i) M
(ii) P2+
b) Write the formula of the compound formed when L combines with N
c) How would reactivities of element N and P with chlorine compare? Explain.
d) Element N combines with oxygen to from an oxide. Using dots (.) and crosses(x) to
represent the outermost electrons, show how the two elements combine.
e) Select the most reactive metal and non-metal and give reason for your answer.
f) State one physical and one chemical property that elements J and Q have in common
g) What name is given to the group of elements to which element M belong?
h) (i) Element K consists of two isotopes with relative abundances 75% and 25% and
mass number 35 and 37 respectively find the relative atomic mass of K.
(ii) Why is the relative atomic mass of K not a whole number?
Date posted: May 13, 2019. Answers (1)
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answer the questions that follow.(Solved)
The table below shows solubilities of two salts M and N at different temperatures. Study it and
answer the questions that follow.
A mixture of 55g of salt M in 100g of water and 30g of salt N in 100g of water were cooled from 90oC to 30oC . Calculate the mass of salt that crystallize out.
Date posted: May 13, 2019. Answers (1)
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Which of the labeled parts is used for heating? Give a reason
Date posted: May 13, 2019. Answers (1)
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During the extraction of lead from its ores one of the main ore used is Galena
(i) Write an equation for the reaction in roasting furnace.
(ii) Name gas
(iii) State one use of lead metal.
Date posted: May 13, 2019. Answers (1)
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Write down the formulae of two possible anions present in salt solution P.
Date posted: May 13, 2019. Answers (1)
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During a displacement reaction, excess iron powder was added to 25cm3 of 0.5 M copper (II) sulphate solutions. The temperature rose from 18.5oC to 33.0oC. Calculate the molar enthalpy of displacement of copper in copper (II) sulphate solution (Specific heat capacity is 4.2 Jg-1K-1, Density of the solution = 1.0g/cm3)
Date posted: May 13, 2019. Answers (1)
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sodium hydroxide.
Date posted: May 13, 2019. Answers (1)
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The diagram below shows a set –up for preparation of hydrogen chloride gas.
Write the equation for the reaction that produces hydrogen chloride gas.
Date posted: May 13, 2019. Answers (1)
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answer the questions that follow:-(Solved)
The following table gives the melting points of oxides of elements in period 3. Study it and
answer the questions that follow:-
(i) Explain the difference in melting points of MgO and P4O10
(ii) Name the compound in the above table that will dissolve both in dilute
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Date posted: May 13, 2019. Answers (1)
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neutralize it.Calculate the concentration of alkali in g/dm3(Solved)
36cm3 of a solution of potassium hydroxide requires 25cm3 of 0.5M sulphuric acid to
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Date posted: May 13, 2019. Answers (1)
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Date posted: May 13, 2019. Answers (1)
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The diagram below represents set-up that can be used to prepare and collect oxygen gas
a) Name solid P
b) What property of oxygen makes it possible for its collection as indicated by the
diagram.
c) Explain why it is important not to collect any gas for the first few seconds of the
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Date posted: May 13, 2019. Answers (1)
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the volume of oxygen gas. Using half equations justify the...(Solved)
During the electrolysis of dilute sulphuric (VI) acid the volume of hydrogen gas collected is twice
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Date posted: May 13, 2019. Answers (1)
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Under certain conditions ,methane reacts with steam to form carbon (II) oxide and hydrogen only. Calculate the total volume of the gas that can be formed when 100cm3 of steam reacts completely with methane.
Calculate the enthalpy change of the reaction.
Date posted: May 13, 2019. Answers (1)
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Date posted: May 13, 2019. Answers (1)
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Date posted: May 13, 2019. Answers (1)
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Date posted: May 13, 2019. Answers (1)
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Name two other gases.(Solved)
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Name two other gases.
Date posted: May 13, 2019. Answers (1)
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Using a suitable equation explain why it is not advisable to use hardwater in hot water
systems.
Date posted: May 13, 2019. Answers (1)