Balancea por tanteo la siguiente ecuación y subraya el enunciado correcto. FeS + 3O2 > FeO + SO2

a. Cuando reaccionan 96 g de O2 se producen 2 moles de FeO.

b. Cuando reaccionan 2 moles de FeS se producen 128 g de SO2.

c. Cuando reaccionan 3 moles de O2 se producen 72 g de FeO.

d. La masa total de los productos es igual a 272 g.​

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

a) the particles of the chair are strongly held together.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.