-Plastic sulphur or amorphous sulphur
-Sulphur has only one non crystalline form.
eddynightsy answered the question on April 17, 2018 at 22:11
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Dry ammonia gas is passed over heated lead(II) oxide in a combustion tube.
a) What observation would be made in the combustion tube
b) Outline a chemical...
(Solved)
Dry ammonia gas is passed over heated lead(II) oxide in a combustion tube.
a) What observation would be made in the combustion tube
b) Outline a chemical test you would use to identify the colourless liquid collected in the u-tube
c) Name the colourless liquid
d) Write an equation for the reaction between ammonia and lead(II)oxide
Date posted:
April 17, 2018
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Answers (1)
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Name the method that can be used to obtain pure iron (III) chloride from a mixture of iron (III) chloride and sodium chloride
(Solved)
Name the method that can be used to obtain pure iron (III) chloride from a mixture of iron (III) chloride and sodium chloride.
Date posted:
April 14, 2018
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Answers (1)
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What is a Neutrino?
(Solved)
What is a Neutrino?
Date posted:
April 14, 2018
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Answers (1)
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State four applications of Nuclear Radiation
(Solved)
State four applications of Nuclear Radiation.
Date posted:
April 14, 2018
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Answers (1)
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State and explain the five main components of Nuclear Power Plants that enables them use heat from nuclear reactors to produce electrical energy.
(Solved)
State and explain the five main components of Nuclear Power Plants that enables them use heat from nuclear reactors to produce electrical energy.
Date posted:
April 14, 2018
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Answers (1)
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Give a reason why electrons are removed from the 4s orbital first then the d orbital to form cations
(Solved)
Give a reason why electrons are removed from the 4s orbital first then the d orbital to form cations.
Date posted:
April 14, 2018
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Answers (1)
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State the four quantum numbers
(Solved)
State the four quantum numbers.
Date posted:
April 14, 2018
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Answers (1)
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State the Heisenberg Uncertainty Principle
(Solved)
State the Heisenberg Uncertainty Principle.
Date posted:
April 14, 2018
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Answers (1)
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State the failures of Bohr Theory
(Solved)
State the failures of Bohr Theory.
Date posted:
April 14, 2018
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Answers (1)
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State the assumptions made by Bohr governing the behavior of electrons in an atom
(Solved)
Assumptions of Bohr governing the behavior of electrons in an atom
Date posted:
April 14, 2018
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Answers (1)
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State the assumptions made by Bohr governing the behavior of electrons in an atom
(Solved)
State the assumptions made by Bohr governing the behavior of electrons in an atom.
Date posted:
April 14, 2018
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Answers (1)
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State five series of hydrogen emissions
(Solved)
State five series of hydrogen emissions.
Date posted:
April 14, 2018
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Answers (1)
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What is deliquescence?
(Solved)
What is deliquescence?
Date posted:
April 13, 2018
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Answers (1)
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Calculate the number of moles of molecules in 7.30g of HCL
(Solved)
Calculate the number of moles of molecules in 7.30g of HCL
Date posted:
April 12, 2018
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Answers (1)
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Starting with lead oxide, describe how you can prepare lead chloride.
(Solved)
Lead chloride is an insoluble salt so it is prepared by double decomposition. So basically we must come up with a soluble salt from the lead oxide, the mix it with another soluble chloride to form the lead chloride.
Date posted:
April 12, 2018
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Answers (1)
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Starting with lead(ii)oxide, describe how you would prepare a solid sample of lead (ii)chloride
(Solved)
Starting with lead(ii)oxide, describe how you would prepare a solid sample of lead (ii)chloride.
Date posted:
April 11, 2018
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Answers (1)
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What do you understand by the term double decomposition?
(Solved)
What do you understand by the term double decomposition?
Date posted:
April 10, 2018
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Answers (1)
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Using kinetic theory explain the difference between solid and liquid
(Solved)
Using kinetic theory explain the difference between solid and liquid
Date posted:
April 10, 2018
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Answers (1)
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Fraction distillation of liquid air usually produces nitrogen and oxygen as the major products
1. Name one substance that is used to remove carbon dioxide...
(Solved)
Fraction distillation of liquid air usually produces nitrogen and oxygen as the major products
1. Name one substance that is used to remove carbon dioxide from the air before it is changed into liquid
2. Describe how nitrogen gas is obtained from the liquid air (boiling points nitrogen = -196 degrees oxygen =-183 degrees
Date posted:
April 10, 2018
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Answers (1)
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Explain how you would separate a mixture of nitrogen and oxygen given that their boiling points are -196^0c and 183^0c
(Solved)
Explain how you would separate a mixture of nitrogen and oxygen given that their boiling points are -196^0c and 183^0c.
Date posted:
April 10, 2018
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Answers (1)