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Chemistry
All levels

Explain how a covalent bond holds two atoms together.

The electrostatic forces of attraction between the shared pair of bonded electrons and the positively charged nuclei hold the atoms together.

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Answered by Adam R. Chemistry tutor
10791 Views

Write an ionic equation, with state symbols, to show the reaction of calcium with an excess of water.

Ca(s)+ 2H2O(l) ---> Ca2+(aq) + 2OH– (aq) + H2(g) 

OM
Answered by Owais M. Chemistry tutor
14097 Views

Which chemical would have a higher boiling point 1,3-dimethylbutane or hexane

Hexane would have the higher boiling point, due to the fact it's unbranched unlike 1,3-dimethlybutane, hexane would have more surface contact and hence more London forces acting upon it. As a result it wo...

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Answered by Talvin R. Chemistry tutor
2999 Views

Describe how to separate hydrocarbons of different lengths

Heat the oil up until it is a vapour Pass into fractionating column Negative temperature gradientHydrocarbons of different lengths have different boiling points They condense at different heights and are ...

MN
Answered by Mia N. Chemistry tutor
2081 Views

In an experiment a burrette was identified as the largest source of uncertainty, how could this uncertainty be reduced?

A burrette is a measuring apparatus a burrette measures the volume of liquid delivered during a titration. with each measurement there is an uncertainty with the recorded measurement of delivered liquid. ...

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Answered by Jarrod G. Chemistry tutor
12192 Views

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