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The particles in a gas are widely spaced and move around freely. This means they will move to fit into any space but in liquids and gases the particles are more closely packed so cannot be compressed.

First I will start by defining the two terms. Atom economy is calculated by dividing the total relative molecular mass of the desired product over the total relative molecular mass of the reactants. You can ...

3 marks so 3 points = chlorine's outer electrons are closer to the nucleus than iodine's (because chlorine has fewer shells)//so chlorine's nucleus is more attracted to its outer electrons than iodine's nucl...

In graphite, carbon atoms are in layers which slide over each other. Whereas in graphene, there is only a single layer of carbon atoms.

Iron (III) / Fe3+ Mr = 56Oxygen / O Mr = 16 Iron (III) Oxide formula = Fe2O3 2x Iron (III) = 56 * 2 = 1123x Oxygen = 16 * 3 = 48 48 + 112 = 160 Fe2O3 relative formula mass = 160