A chemist measures the energy change Delta H during the following
2Fe2O3(s) > FeO(s) + O2(g). ΔH = 560 kJ
1) This reactions is .
O Endothermic
O Exothermic
2) Suppose 94.2g of Fe2O3 react. will any heat be relased or absorbed?
O Yes, absorbed.
O Yes, released.
O No.

1) endothernic

2) Yes absorbed

Explanation:

Decomposition is a chemical reaction in which one reactant gives two or more than two products. All decomposition reactions are endothermic reactions as energy is absorbed to break the bonds.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.

i think it is true since you can test the answer and can use observations to complete it.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer