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[Throughout the question, references will be made to a diagram which shows the mechanism of the reaction] In organic addition reactions like the one described in the question, an unstable intermediate car...

By raising the temperature of the reaction mixture, the particles have more (kinetic) energy and so move around at a greater rate. This means there are more frequent collisions, due to the increased speed...

2NaNH2 + N2O --> NaN3 + NaOH + NH3

Mr(NaN3) = 65   Mr(NaNH2) = 39    
n(NaN3) = 550/65 = 8.46
100% NaN3 = 550/65 x 100/95 = 8.91
n(NaNH2) = 2 x 8.91 = 17.8
m(NaNH2) = 17....

Covalent bonding is the sharing of a pair of electrons between atoms to make molecules e.g. CO₂, whereas Ionic bonding is the transfer of electrons from one atom to the other to m...

There will be no need for state symbols.

First of all, to balance these equations, list the number of each atom, for both sides of the equation.

In this example, it would be:
...