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Chemistry
GCSE

Look at this diagram of a methane molecule. Which statement about methane is correct? - A) Electrons are transferred from hydrogen atoms to carbon atoms. - B) The covalent bonds in methane are weak.

(didn't fit:)C) The force of attraction between methane molecules is weak. D) The ionic bonds between carbon and hydrogen are very strong.Answer: C

Answered by Shivani K. Chemistry tutor
4415 Views

Please describe how temperature, concentration and the use of a catalyst affects rate of reaction.

For a reaction to be successful two atoms need to collide with a sufficient amount of energy (activation energy). Raising the temperature increases the amount of kinetic energy that the atoms have, which ...

Answered by Georgie S. Chemistry tutor
2294 Views

Describe the structure, bonding and properties of diamond

Diamond has a giant covalent lattice structure. Each carbon atom forms a strong covalent bond with 4 other carbon atoms (forms 4 covalent bonds). As a result this makes d...

Answered by Hannah O. Chemistry tutor
8956 Views

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 ...

Answered by Sam W. Chemistry tutor
9192 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...

Answered by Haaris R. Chemistry tutor
4226 Views

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