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Chemistry
GCSE

What is the mass percentage of carbon in a CO2 molecule?

First we need to calculate the total mass of a CO2 molecule. This is done by summing up the individual masses of all the atoms. To find these, we look at the periodic table and see that the mas...

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Answered by Ana D. Chemistry tutor
4173 Views

Ionic compounds have high melting points: Explain why and explain why Calcium Oxide has a higher melting point than Lithium Chloride

Ionic compounds are formed when electrostatic attractions form between oppositely charged ions. These attractions are strong and so require a large amount of energy to break. This energy is provided in th...

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Answered by Sam M. Chemistry tutor
22652 Views

How might I go about balancing chemical equations?

First let us look at what the specification asks of you as a student:E.g. AQA GCSE chemistry specification 4.3.2.3 Using moles to balance equations (HT only) The balancing numbers ...

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Answered by Claudia G. Chemistry tutor
3127 Views

Why does iodine have a higher boiling point than chlorine?

Iodine is a larger molecule, with more electrons, than chlorine. Therefore Iodine has stronger intermolecular forces than chlorine, which require more energy to break. This results in Iodine having a high...

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Answered by Ben W. Chemistry tutor
30090 Views

Explain covalent bonding and give an example of a simple covalent molecule.

A covalent bond is a shared pair of electrons between 2 atoms.An example of a simple covalent molecule is CH4 (methane)

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Answered by Zoe S. Chemistry tutor
2175 Views

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