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Chemistry
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Describe what happens when 2 atoms of potassium react with 1 atom of sulphur? Give the answer in terms of electron transfer.

The electrons are transferred from potassium to sulphur, in this reaction, potassium is being oxidised and sulphur is being reduced. Two potassium atoms each lose one electron forming K+ ions. Sulphur gai...

TT
Answered by Thomas T. Chemistry tutor
43278 Views

Explain why the enthalpy of lattice dissociation of potassium oxide is less endothermic than that of sodium oxide.

Lattice dissociation enthalpy is the enthalpy change when one mole of a gaseous ionic lattice dissociates into isolated gaseous ions. The process is endothermic because energy is required to overcome the ...

LJ
Answered by Louise J. Chemistry tutor
24074 Views

describe advantages and disadvantages of using hydrogen instead of fossil fuels

advantages: . combustion only leads to water production, no pollutants . no carbon dioxide, so no greenhouse gases . no sulfur dioxide so no acid rain . releases more energy so more efficent . renewable d...

WT
Answered by William T. Chemistry tutor
4013 Views

How do you name this hydrocarbon?

So to mention anything about hydrocarbons, you first have to find the longest chain of carbons in the molecule! It doesn't have to be straight - it can be bent, or turn in a circle or anything like that! ...

SM
Answered by Scott M. Chemistry tutor
3535 Views

a sample of hydrated NiSO4 witha mass of 4.414g is heated to remove all water crystallisation. The resultant mass is 2.287g. How many H2O molecules to each NiSO4 were there in the original sample

Mr of NiSO4 is 154.8 g/mol Mr of H2O is 18

Mass of NiSO4 in sample is 2.287 g Mass of H2O in sample is 4.414-2.287 = 2.127g

divide mass of each of NiSO4 and H2O by Mr to obtain the ratio in ...

CS
Answered by Calum S. Chemistry tutor
3019 Views

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