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Chemistry
A Level

1.5 g of hydrocarbon undergoes complete combustion to give 4.4 g of CO2 and 2.7 g of H2O. Given this data, what is the empirical formula of this hydrocarbon?

The first step here is to determine the mass of C in CO2 and the mass of H in H2O. This is done by dividing the atomic mass by the molecular mass and then multiplying by the mass ...

JH
Answered by Joshua H. Chemistry tutor
84908 Views

Why is phenol more reactive than benzene?

Phenol (which is a benzene ring with one substituted carbon with a hydroxyl or alcohol group) does not require a halogen carrier to be halogenated whereas benzene itself cannot react with a halogen alo...

TN
Answered by Thomas N. Chemistry tutor
37759 Views

What is the difference between a nucleophile and an electrophile?

A nucleophile is a molecule or ion that donates a pair of electrons to form a new covalent bond. It is strongly attracted to a region of positive charge. Common nucleophiles include hydroxide ions; due...

LM
Answered by Liam M. Chemistry tutor
21646 Views

What is a mole?

A mole is a unit of measurement for the amount of a substance. One mole is 6.02 x 10^23 particles in a substance, known as Avogadro's constant. This is because this is the number of atoms in  <...

LM
Answered by Liam M. Chemistry tutor
3406 Views

Proteins are an important part of a healthy diet because they provide essential amino acids. (a) State what is meant by an essential amino acid.

 There are 20 amino acids, and they can be classified as essential or non-essential – if they are non-essential they can be synthesised by the human body...

DC
Answered by Darragh C. Chemistry tutor
3352 Views

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