Polyphenylethene/ polyslyrene
maurice.mutuku answered the question on September 9, 2019 at 09:51
- An element O has two isotopes..(Solved)
An element O has two isotopes 
containing 90% and Isotope 
Find the R.A.M of O.
Date posted: September 9, 2019. Answers (1)
- The following equation involve hydrochloric acid.
MnO2(s) + 4HCl(aq)------>MnCl2(aq) + 2H2O(l) + Cl2(g)
State the type of reaction taking place in the reaction.
(Solved)
The following equation involve hydrochloric acid.
MnO2(s) + 4HCl(aq)------>MnCl2(aq) + 2H2O(l) + Cl2(g)
State the type of reaction taking place in the reaction.
Date posted: September 9, 2019. Answers (1)
- Study the following part of the solvay process for the manufacture of sodium carbonate and answer the questions that follow:(Solved)
Study the following part of the solvay process for the manufacture of sodium carbonate and answer the questions that follow:
(i) State the main source of Carbon (IV) oxide in the process.
(ii) Write down the overall equation for the reaction in chamber I.
(iii) Name process in step 1.
Date posted: September 9, 2019. Answers (1)
- What is the atomic number and mass number T?(Solved)
A radioactive isotope T decays by emitting three alpha particles to form 
.
What is the atomic number and mass number T?
Atomic number -
Mass number -
Date posted: September 9, 2019. Answers (1)
- Give the name of the following ion [Zn(NH3)4]2+(Solved)
Give the name of the following ion [Zn(NH3)4]2+
Date posted: September 9, 2019. Answers (1)
- Write ionic equations to show how excess sodium hydroxide added to a solution containing Al3+ ions reacts.(Solved)
Write ionic equations to show how excess sodium hydroxide added to a solution containing Al3+ ions reacts.
Date posted: September 9, 2019. Answers (1)
- Elements P and Q have the following atomic numbers 19 and 8 respectively.
Using dot and cross draw a diagram to show how the elements form...(Solved)
Elements P and Q have the following atomic numbers 19 and 8 respectively.
Using dot and cross draw a diagram to show how the elements form bonds.
Date posted: September 9, 2019. Answers (1)
- Given elements A, B and C with atomic numbers 11, 19 and 13 respectively.
(a) Compare the atomic radius of A and C. Explain.
(b) Compare...(Solved)
Given elements A, B and C with atomic numbers 11, 19 and 13 respectively.
(a) Compare the atomic radius of A and C. Explain.
(b) Compare reactivity of A and B.
Date posted: September 9, 2019. Answers (1)
- Haber process (the manufacture of ammonia gas) is given by the following equation.(Solved)
Haber process (the manufacture of ammonia gas) is given by the following equation.
State and explain the effect of:
(a) Introducing some drops of water to the equilibrium.
(b) Pumping nitrogen gas to the equilibrium mixture.
(c) Lowering the temperature of the reaction.
Date posted: September 9, 2019. Answers (1)
- Using oxidation numbers, determine from the equation below the species which undergoes oxidation and reduction.
2FeCl2(aq) + Cl2(g)----->2Fe Cl3(aq)
Oxidation -
Reduction -(Solved)
Using oxidation numbers, determine from the equation below the species which undergoes oxidation and reduction.
2FeCl2(aq) + Cl2(g)----->2Fe Cl3(aq)
Oxidation -
Reduction -
Date posted: September 9, 2019. Answers (1)
- Calculate the oxidation state of chromium in the ion Cr2 O2-(Solved)
Calculate the oxidation state of chromium in the ion Cr2 O2-
Date posted: September 9, 2019. Answers (1)
- Gas Q with a relative molecular mass of 48 took 50 seconds to diffuse through a porous diaphragm. How long will it take for the...(Solved)
Gas Q with a relative molecular mass of 48 took 50 seconds to diffuse through a porous diaphragm. How long will it take for the same amount of hydrogen Chloride (HCl) to diffuse through the same diaphragm under similar conditions? (H = 1.0, Cl = 35.5).
Date posted: September 9, 2019. Answers (1)
- Draw a well labeled diagram showing how blister copper is purified.(Solved)
Draw a well labeled diagram showing how blister copper is purified.
Date posted: September 9, 2019. Answers (1)
- The molar heat of fusion of ice at O0C is 6kJ mol-1. Calculate the heat change when 36g of ice is converted to 36g of...(Solved)
The molar heat of fusion of ice at O0C is 6kJ mol-1. Calculate the heat change when 36g of ice is converted to 36g of water at 1O0C. (SHC = 4.2-1g K-1, density = 1.0g/cm3, H = 1.0, O = 16.0)
Date posted: September 9, 2019. Answers (1)
- Name the following organic compounds.(Solved)
I.Name the following organic compounds.
(a) 
(b) HOCH2 - CHOH - CH2OH
II.Given:
Date posted: September 9, 2019. Answers (1)
- Study the diagram below (Solved)
Study the diagram below
Why would it not be advisable to use potassium in place of iron in the set-up?
Date posted: September 9, 2019. Answers (1)
- 6.95g of hydrated iron (II) sulphate FeSO4. nH2O was dissolved in 250 cm3 solution resulting into a 0.1M solution.
Determine the value of n. (Fe =...(Solved)
6.95g of hydrated iron (II) sulphate FeSO4. nH2O was dissolved in 250 cm3 solution resulting into a 0.1M solution.
Determine the value of n. (Fe = 56, O = 16, S = 32, H = 1).
Date posted: September 9, 2019. Answers (1)
- A, B, C are three homologous series of organic compounds.(Solved)
A, B, C are three homologous series of organic compounds.
(i) What is the name given to series C?
(ii) Write down the name and structural formula of the second member of series “B”.
(iii) Draw the structural formulae of the first two members of the series "A".
(iv) Complete the balance in the following equation:
CH3CH3 + O2 →
Date posted: September 9, 2019. Answers (1)
- Starting with lead oxide, describe how a pure sample of lead carbonate can be prepared in the laboratory.(Solved)
Starting with lead oxide, describe how a pure sample of lead carbonate can be prepared in the laboratory.
Date posted: September 9, 2019. Answers (1)
- Describe the chemical test that can be used to distinguish sodium sulphate from sodium sulphite.(Solved)
Describe the chemical test that can be used to distinguish sodium sulphate from sodium sulphite.
Date posted: September 9, 2019. Answers (1)