a. 2 Zn + O2 --> 2 ZnO

b. 4 Zn + 2 SO2 --> 4 ZnO + S2
c. Zn + SO2 --> ZnS + O2
d. Zn + I2 --> ZnI2
e. Zn + O2 --> CO2 + H2O
what reactions correspond to each one of this problems

To determine which reactions correspond to each problem, we need to analyze the chemical equations given. Let's break down each problem step by step:

a. 2 Zn + O2 --> 2 ZnO
This equation represents the reaction between zinc (Zn) and oxygen (O2) to form zinc oxide (ZnO). This is the correct corresponding reaction for problem (a).

b. 4 Zn + 2 SO2 --> 4 ZnO + S2
In this equation, zinc (Zn) reacts with sulfur dioxide (SO2) to produce zinc oxide (ZnO) and sulfur (S2). This is the correct corresponding reaction for problem (b).

c. Zn + SO2 --> ZnS + O2
The chemical equation shows the reaction between zinc (Zn) and sulfur dioxide (SO2) to form zinc sulfide (ZnS) and oxygen (O2). This is the correct corresponding reaction for problem (c).

d. Zn + I2 --> ZnI2
In this equation, zinc (Zn) reacts with iodine (I2) to produce zinc iodide (ZnI2). This is the correct corresponding reaction for problem (d).

e. Zn + O2 --> CO2 + H2O
The given reaction represents the incorrect corresponding reaction for any of the given problems. It shows zinc (Zn) reacting with oxygen (O2) to form carbon dioxide (CO2) and water (H2O), which is unrelated to the given problems.

To summarize:
a. 2 Zn + O2 --> 2 ZnO (Problem a)
b. 4 Zn + 2 SO2 --> 4 ZnO + S2 (Problem b)
c. Zn + SO2 --> ZnS + O2 (Problem c)
d. Zn + I2 --> ZnI2 (Problem d)