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    why is the nitrogen in NH3 bonded to a carbon chain positive. This is for substitution reactions in chemistry
    Also, why does the hydrogen donate its electrons to the nitrogen and ammonia donate its electrons to the hydrogen.
    Can you give me step-by-step of how to do a substitution reaction with excess ammonia, please because I do not know why hydrogen gives electrons to nitrogen etc.
    Also when ammonia is in excess do you put a big 2 in front (2 moles of it) or do you have to actually work it. If so, how do I do that
    Also what is the difference between the delta positive and just the positive sign
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    (Original post by esmeralda123)
    Also what is the difference between the delta positive and just the positive sign
    why is the nitrogen in NH3 bonded to a carbon chain positive.

    Two hydrogen atoms are bonded initially to the nitrogen as well as carbon. So there is a -NH2 group. To have NH3+, a hydrogen ion binds to the NH2. It accepts the nitrogen's valence electrons and the Nitrogen gains a positive charge.

    Also what is the difference between the delta positive and just the positive sign
    Positive charge means you're looking at an ion. I.e it has lost an electron. A delta positive is added to atoms in a covenant bond with a positive dipole. This means that they are less electronegative than the atom they're bonded to and so attract the electron less strongly.
 
 
 
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