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What is the relationship between the boiling point of an alkane and the number of carbon atoms in its molecule?

The boiling point increases as the number of carbon atoms increases.
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Answered by Ally W. • Chemistry tutor
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An alcohol, X has an Mr of 74 and percentage composition of 64.9% Carbon, 13.5% Hydrogen and 21.6% Oxygen. It does not turn potassium dichromate (VI) green. Determine the structural formula of X, and state its name.

64.9/12 = 5.40833 21.6/16 = 1.35 5.40833/1.35 = 4 so 4 Carbons 13.5/1.35 = 10 so 10 Hydrogens 1.35/1.35 = 1 so 1 Oxygen 4x12+10+16 = 74 so emperical formula = Molecular formula it is a tertiary alcohol becau...
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Answered by Megan B. • Chemistry tutor
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Describe the reasons why the rates of strontium and barium with water is different

Barium reacts quicker with water than strontium as it has a lower first ionisation energy than strontium as barium has a larger atomic radius and so their is more shielding for the outer electrons. although ...
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Answered by Mohamed E. • Chemistry tutor
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What is the enthalpy of atomisation?

The enthalpy of atomisation is the enthalpy change when 1 mole of gaseous atoms is formed from its constituent element, in standard conditions.
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Answered by Eugeni R. • Chemistry tutor
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Explain why the ionisation energies tend to increase across a period

As you go across a period, the next atom will have 1 more proton in its nucleus than the one before. Therefore, the nucleus of each atom will have an increasingly positive charge, meaning a stronger nuclear ...
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Answered by Megan S. • Chemistry tutor
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