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Although C and Si are both group 4 elements, C is much smaller than Si and can form double bonds with two oxygen atoms whereas Si is larger and so forms single bonds with four oxygen atoms. This means th...

Using the formula mass=Mr * moles we can rearrange this so it equals moles= mass / Mr. We are told the mass of the NaCl is 50g however we need to work out the Mr (relative formula mass) of the NaCl too. W...

Water exhibits hydrogen bonding between neighbouring molecules, where other group 6 hydrides are held together by much weaker (ca. 10 x) Van Der Waal's forces of attraction. Waters hydrogen bondong abilit...

Graphene is a giant covalent compound made purely of carbon atoms. Within graphene each carbon atom is covalently bound to just 3 other carbon atoms. A carbon atom usually makes 4 covalent bonds. This mea...

We’d use filtration. The mixture is poured over filterpaper in a funnel. The solid(residue) is left behind and the filtrate is pure liquid with no solid.