Question

which formula equation represents the burning of sulfur to produce sulfur dioxide?
s(s) + o2(g) → so2(g)
2h2s(s) + 3o2(g) → 2h2o(l) + 2so2(g)
4fes2 + 11o2 → 2fe2o3 + 8so2
2so2(g) + o2(g) → 2so3(g)

Explanation:

Step1: Analyze reactants

The reaction is sulfur burning. Reactant is sulfur (S) and oxygen ($O_2$).

Step2: Analyze products

Product should be sulfur dioxide ($SO_2$).

Step3: Check options

Only first option has sulfur reacting with oxygen to form sulfur - dioxide. Second option has hydrogen - containing compound reacting, third has iron - containing compound reacting, fourth is a reaction of sulfur dioxide with oxygen to form sulfur trioxide.

Answer:

A. $S(s)+O_2(g)\xrightarrow{\Delta}SO_2(g)$