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Lets start with what a concentration is. Concentration is the amount of something in a volume. For example, 1 gram of sugar in one litre of water is 1 gram per litre. This can be written as 1g/L (the divi...

To answer this question we need to think about the bonding that occurs within metals. Metallic elements form strong lattices due to the metallic bonding. This consists of a lattice of positive metal atoms...

2 AgI + 1 Na₂S → 1 Ag₂S + 2 NaI Both sides of the equation need to have the same number of each element. We need to make sure that the amount of one element we have on one side of th...

Zn(s) + H₂SO₄ (aq) –> ZnSO₄(aq) + H₂(g)

Zinc reacts with sulfuric acid to form zinc sulphate and hydrogen gas

Balance the carbon atoms first by adding a 4 in front of the CO2,

Then balance the hydrogen atoms by adding a 4 in front of the H2O, 

Count up the number of oxgens on the right hand side: (4...