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Chemistry
A Level

Predict the bond angles and shape of a molecule of ammonia.

  1. There are four (4) groups of electrons around the central nitrogen atom (3 shared pairs and one lone pair of electrons)2) According to electron repulsion theory, the electrons move further away from...
Answered by Nathan B. Chemistry tutor
4199 Views

How does the first ionization enthalpy change down group 2?

First ionization enthalpy is the energy required to remove one electron from each atom in one mole of gaseous atoms, forming one mole of gaseous 1+ ions. The first ionization enthalpy is largely dependent...

Answered by Matthew S. Chemistry tutor
1554 Views

How do you draw an alkene stereoisomer?

Definition of StereoisomerThe meaning of a stereoisomer is compounds with the same structural formula but a different arrangement of atoms in space.
How to Draw...

Answered by Hussain M. Chemistry tutor
1458 Views

Describe the shape of and bonding in a molecule of benzine. Explain why benzene doesn't readily undergo reactions.

Flat 6-membered ring with 6 carbons. Each carbon in bonded two 1 hydrogen and 2 other carbons. Because a carbon must always have 4 bonds, there is a delocalised fourth electron on each carbon, which moves...

Answered by Michal Z. Chemistry tutor
1969 Views

Bethan prepared some ethoxyethane (line 6) by reacting ethanol with concentrated sulfuric acid. She used 69g of ethanol (Mr=46) and obtained a 45% yield of ethoxyethane (Mr=74). Calculate the mass of ethoxyethane obtained.

  1. Equation from line 6 is: 2 (ethanol) -------> 1 (ethoxyethane)
    2. The ratio of reaction is 2:1. This is the ratio of moles not mass, i.e., 2 moles of ethanol give 1 ...
Answered by Shreyasi D. Chemistry tutor
1806 Views

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