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A catalyst increases the rate of the reaction because: 

• They provide an alternative energy pathway that has a lower activation energy 

• This means that more particles hav...

Reduction: loss of oxygen (or gain of electrons)

Heat is a form of energy - the more heat a particle has, the more energy it has, and so the faster it moves. This increases the number of collision is a set period of time, whilst also increasing the numb...

Giant covalent structures are made up of many covalent bonds between atoms. They have high melting points because it takes a lot of energy to break the strong covalent bonds between the a...

H₂SO₄ ---> 2H⁺ + SO₄^{2-                                                                                                                                  ...}