Write the formula for a complex formed between fe3 and ethylenediamine (nh2ch2ch2nh2), with a coordination number of 6.

We have to get the formula of the complex formed between Fe³⁺ and ethylenediamine.

The formula of the complex is: [Fe(en)₃]³⁺, where, en is abbreviation of ethylenediamine.

Ethylenediamine (en) is a bidentate ligand as it contains two donating sites (-NH₂ groups). Three ethylenediamine co-ordinate to central metal ion, Fe³⁺ and forms [Fe(en)₃]³⁺ with a co-ordination number of six.

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

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