Mass relationships in chemical reaction.
For the combustion of methane, beginning with 3.15 mole of CH4.
How many moles of CO2 are obtained when the CH4 is completely combusted?
The balanced chemical equation for the combustion of methane is:
CH4 + 2O2 -> CO2 + 2H2O
According to the equation, for every 1 mole of CH4 consumed, 1 mole of CO2 is produced. Therefore, if we start with 3.15 moles of CH4, we will obtain 3.15 moles of CO2 when it is completely combusted.
Answer: 3.15 moles of CO2 are obtained when the CH4 is completely combusted.