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20kg of ammonium nitrate is made from ammonia and nitric acid, what mass of ammonia was used?

The given equation is - NH₃+ HNO₃ --> NH₄NO₃
Equation to use - Moles = Mass/RFM
RFM of ammonium nitrate = 14 + 4 + 14 + (3x16) = 80
20kg = 2...

Answered by Jonathan S. • Chemistry tutor

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How should I approach answering moles calculation questions?

The key to answering any moles calculation question in chemistry is working out which equation you need to use. Generally, if moles are involved it will be moles = volume x concentration or moles = mass/R...

Answered by Jonathan S. • Chemistry tutor

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What is the evidence that disproves the Kekule model for benzene?

The enthalpy change of hydrogenation of benzene was shown to be less exothermic than 3 times that of hexene, therefore meaning that benzene does not contain three double bonds. X-ray imaging showed that b...

Answered by Ioana P. • Chemistry tutor

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Why is benzene more stable than the theoretical model cyclohexa-1,3,5-triene?

In cyclohexa-1,3,5-triene the molecule has 3 single bonds and 3 double bonds where all the electrons are localised. As a result the energy needed to hydrogenate cyclohexa-1,3,5-triene is (3x -120kJ/mol) =...

Answered by Afia P. • Chemistry tutor

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What are the 3 main types of chemical bonding? Give definitions of them.

IonicCovalentMetallic
Ionic bonding The electrostatic attraction between positive and negative ions
Covalent bonding Electrostatic attraction between a shared pair of electrons and the nuclei <...

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