Balance the skeleton equations for the following reactions:

1) lithium(s) + gold (iii) chloride (aq) to lithium chloride (ag) + gold (s).

2) iron (s) + tin (iv) nitrate (aq) to iron (iii) nitrate (aq) + tin(s)

3) nickel(ii) cholride (s) + oxygen (g) to nickel (ii) oxide (s) + dichlorine pentoxide (g)

4) lithium chromate (aq) + barium chloride (aq) to lithium chloride (aq) + barium chromate (s)

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