Answer:
0.296L of O₂ are needed for the reaction
Explanation:
This is the reaction:
O₂ + 2CO → 2CO₂
To determine volume, we must work with density. But firstly we have to know the mass.
Density = mass/volume
Ratio is 2:1
CO density = CO mass / CO volume
1.18×10⁻³g/mL = CO mass / 0.626 L
First we must convert 0.626L to mL, because the units of density
0.626L = 626 mL
1.18×10⁻³g/mL = CO mass / 626 mL
CO masa = 1.18×10⁻³g/mL . 626 mL → 0.741 g
Let's convert to moles, the mass of CO ( mass . molar mass)
0.741 g / 28 g/mol = 0.0264 moles
As ratio is 2:1, we would need the half of moles, so (0.0264 / 2) = 0.0132 moles are required for the reaction.
Let's convert the moles to mass (molar mass . moles)
32 g/mol . 0.0132 mol = 0.423 g
Now, we can work with oxygen density
O₂ density = O₂ mass / O₂ volume
1.43×10⁻³g/mL = 0.423g / O₂ volume
O₂ volume = 0.423g / 1.43×10⁻³g/mL → 296 mL
296 mL / 1000 = 0.296L
