Qla. A 9 carat gold ring is made from a mixture of metals. The table below shows the mass of different metals in the ring. The mass of the ring is 5.0 g. The cost of
gold is £30 per gram. Calculate the cost, in £. of the gold used in the 9 carat gold
ring. Use the table above. [1]

Metal
Mass of metal in g
Gold
1.9
Silver
2.8
Copper
0.3​

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.