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Balancing the equation means there must be an equal number of each element on both sides of the equation. In this case, we start with 8 carbon atoms on the left and just 1 on the right, so we can put 8 molec...

The bonds in H 2 O are covalent bonds. Covalent bonds are formed when two atoms share a pair of electrons, often where one electron is donated by each atom. This forms a bond as there is an electrostatic att...

They're both similar but form between different types of elements. An ionic bond will form between a metal and a non-metal. The metal will donate electrons and the non-metal will accept the electrons, formin...

For an EXothermic reaction energy EXits the reaction meaning that there is more energy at the start than there is at the end. In a reaction profile this is shown by a drop of energy from the reactants to the...

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. We d...