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Chemistry
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Explain how crude oil gets separated into its components

Crude oil is a mixture of hydrocarbons with varying length carbon chains. The main method used to separate these is fractional distillation. The crude oil is heated, then placed inside a fractionating col...

KR
Answered by Kathryn R. Chemistry tutor
16918 Views

which element has a lower first ionisation energy, Magnesium or Aluminium?

Ionisation energy is the energy required to remove one electron from an isolated gaseous atom (in its ground state). This generates a cation (ion with a positive charge).
Both Mg and Al are in period...

HA
Answered by Hajra A. Chemistry tutor
4191 Views

What is the difference between ionic and covalent bonding

The main difference is that covalent bonding is the sharing of electrons, whereas in ionic bonding electrons are transferred. Ionic bonding is between a metal and a non-metal whereas covalent bonding is b...

VG
Answered by Verity G. Chemistry tutor
4345 Views

A 20cm³ sample of lithium hydroxide solution of unknown concentration is neutralised by 12.25cm³ of 0.15mol/dm³ of sulfuric acid. Calculate the concentration of the lithium hydroxide solution.

0.184mol/dm³

SA
4505 Views

Hydrogen chloride (HCl) has a melting point of -114.2 °C. Sodium chloride (NaCl) has a melting point of 801 °C. Explain in terms of structure and bonding why these substances have such different melting points?

Hydrogen chloride has a simple molecular structure. The atoms within the molecule are held together by strong covalent bonds. However, for simple covalent molecules to melt only the weak intermolecular f...

AJ
28470 Views

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