KO2 - (ox. number oxygen - 1/2) is used to produce O2 in space expeditions by using CO2 according to?

How many moles O₂ are produced from 100 g CO₂ if there is an abundance of KO₂ ?

Molar mass of CO₂ = (12.0 + 16.0×2) g/mol = 44.0 g/mol
Molar mass of O₂ = 16.0×2 g/mol =32.0 g/mol

4KO₂ + 2CO₂ → 2K₂CO₃ + 3O₂
Molar ratio CO₂ : O₂ = 2 : 3

No. of moles of CO₂ reacted = (100 g) / (44.0 g/mol) = 2.273 mol
No. of moles of O₂ = (2.273 mol) × (3/2) = 3.41 mol
Mass of O₂ produced = (3.41 mol) × (32.0 g/mol) = 109 g (to 3 sig. fig.)

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How many moles CO₂ can 100 g KO₂ consume?

Molar mass of KO₂ = (39.0 + 16.0×2) g/mol = 71.0 g/mol
Molar mass of CO₂ = (12.0 + 16.0×2) g/mol = 44.0 g/mol

4KO₂ + 2CO₂ → 2K₂CO₃ + 3O₂
Molar ratio KO₂ : CO₂ = 4 : 2

No. of moles KO₂ reacted = (100 g) / (71.0 g/mol) = 1.408 g/mol
No. of moles of CO₂ consumed = (1.408 mol) × (2/4) = 0.704 mol
Mass of CO₂ consumed = (0.704 mol) × (44.0 g/mol) = 31.0 g (to 3 sig. fig.)