Write and balance the chemical equation for the reaction associated with ΔHof of Fe2O3(s). What is the sum of all of the coefficients in your balanced chemical equation? (Ex: the answer would be 5 for the reaction: 2 CO + O2 -> 2 CO2)

The sum of all of the coefficients in your balanced chemical equation is 9

Explanation:

The standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

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.

The balanced equation for formation of is:

The sum of all of the coefficients in your balanced chemical equation is = 4+3+2= 9

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.