Chemistry Help?????????????

Question

What volume of O2 at 298K and 2 atm is required to react completely with 2L of Methane at the same temperature and pressure? Here, because you are looking at a reaction, you need a balanced chemical equation. You need to determine the number of moles of methane, which you can do, since you have pressure, volume, and temperature. Then, utilizing the mole to mole ratio from your balanced chemical equation, you can calculate the number of moles of O2 required to react with the methane. From there, you can use the relationship to determine the final volume of O2.

Answer 1

1 CH4 & 2 O2 --> 1 CO2  & 2 H2O

when we do not change the pressure or the temperature, then volume & moles are proportional

1 mole of methane reacts with 2 moles of oxygen, & then so will 1 liter of methane react with 2 litres of oxygen

which means that 2 litres of methane needs = twice= 4 litres of Oxygen

your answeris: 4 litres of oxygen