Name the type of reaction and give the coefficients needed to balance the following skeleton reaction: + → + a) synthesis with coefficients 3,1,2,3 respectively b) synthesis with coefficients 3,2,2,3 respectively c) single replacement with coefficients 3,1,2,3 respectively d) single replacement with coefficients 1,1,2,3 respectively

C) single replacement with coefficients 3,1,2,3 respectively

Explanation: A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.Thus magnesium can easily lose electrons as compared to iron and result in the formation of iron and magnesium oxide.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Thus the coefficients are 3, 1 , 2 and 3.

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1. they vary with a higher number because boiling is way hotter than melting