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C10H22 (l) + 11.5O2 (g) --> 10CO(g) + 11H20 (g)Incomplete combustion so the products are CO and H2O, remember to include state symbols as the question asks for gaseous products.

Mg + 2HCl --> MgCl2 + H2
There are two chlorines in magnesium chloride so you put a two in front of the hydrochloric acid. This means that you need to put a 2 aft...

Ionic bonding is bonding between a metal and a non-metal. This happens due to a transferal of electrons. For example a metal from group 2 such as Magnesium bonding to a non-metal from gro...

In iron, all the atoms are of the same size so the layers can slide past each other. In steel, there are both carbon and iron atoms which are different sizes, meaning the layers are disrupted and cannot e...

boiling point 102°C freezing point –2°C
We shall now look at the molecular origin of the lowering of the freezing point and elevation of the boiling point. First of all, we know that the entropy of ...