From the given information, we have 4 molecules of CH4 (methane) and excess O2 (oxygen). The combustion reaction between methane and oxygen is:

CH4 + 2O2 → CO2 + 2H2O

1. Calculating the number of CO2 molecules:

From the balanced chemical equation, we see that for every 1 molecule of CH4, 1 molecule of CO2 is produced. Therefore, for 4 molecules of CH4, we can produce 4 molecules of CO2.

Answer: 4 molecules of CO2 can be made.

2. Calculating the number of H2O molecules:

From the balanced chemical equation, we see that for every 1 molecule of CH4, 2 molecules of H2O are produced. Therefore, for 4 molecules of CH4, we can produce 8 molecules of H2O.

Answer: 8 molecules of H2O can be made.