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How many peaks would you expect from a Hydrogen NMR of Ethane?

Ethane is a symmetric molecule, therefore both groups of hydrogens occur in the same region and not in two different regions (for example chloroethane would have two different regions). Using the n+1 rule, t...
DO
Answered by Daniel O. • Chemistry tutor
13405 Views

What is Iraneus' theodicy?

The problem of evil questions how an all-knowing, all-loving and all-powerful God is consistent with the existence of evil in the world. Iraneus’ theodicy is a response to the problem of evil, and his argume...
MD
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"I don't understand how to use the French subjunctive. Could you explain it for me?"

The French subjunctive is important for the written language, but is rarely heard now in spoken French. You should be able to recognise and form it when doing written translations, as the French still place ...
SS
Answered by Stephen S. • French tutor
6174 Views

Describe how a B-cell responds the first time it is stimulated by an antigen. [3 marks]

A B-cell with a specific antigen receptor will bind to a complementary antigen, when exposed to that antigen in the body. This specific complementary binding leads to that B-cell becoming activated. An activ...
ZB
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Explain why the 2nd Electron aiffinity of Chlorine is Endothermic whilst the first electron affinity is exothermic

With the first electron affinity, the chlorine atom is one electron from a full octet ( and is a neutral species). When you add an electron to the chlorine, the negatively charged electron is electrostatical...
HC
Answered by Hayden C. • Chemistry tutor
11802 Views