The haber process - Is a process which makes ammonia, ammonia - is used for making fertilisers, An iron catalyst - is used to speed up the reaction., a temperature higher than 450 degrees - cannot be used or the yield is too low., a temperature lower than 450 - cannot be used or the rate is too slow, 200 atmospheres - is a high pressure to increase the rate of reaction, nitrogen and hydrogen - are the reactants,

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