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Chemistry
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How can chromatography be used to identify substances?

Chromatography can be used to determine the RF value of an unknown substance. This RF value when cross-referenced with already known RF values can then be used as a guide to find out a potential range of ...

SW
Answered by Sam W. Chemistry tutor
11719 Views

Explain why chlorine is more reactive than iodine(3 marks)

The chlorine atom is smaller than the iodine atom therefore its 7 outer electrons are closer to the nucleus than the 7 outer electrons in iodine. In turn, this means the positively charged chlorine nucleu...

HR
Answered by Haaris R. Chemistry tutor
7546 Views

Explain why graphite can conduct electricity

Each carbon atom forms covalent bonds with three other carbon atoms and one electron from each carbon atom is delocalised.It is these delocalised electrons which allow electricity to be conducted as they ...

TD
6629 Views

Explain why atomic radius decreases across a period

As you go along a period, there is an increasing number of protons in the nucleus of each atom meaning that the nucleus has an increasing positive charge.This means that the electrons are puller closer to...

TD
32658 Views

In the reaction CO(g) + 2H2(g) <--> CH3OH(g), explain why an increase in pressure increases the yield of methanol

Increasing the pressure shifts equilibrium towards the side with fewer moles of gas, so in this reaction the equilibrium will move to the right. Hence, a shift towards the right hand side...

Answered by Chemistry tutor
13690 Views

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