Aself-contained underwater breathing apparatus (scuba) uses canisters containing potassium superoxide. the superoxide consumes the co2 exhaled by a person and replaces it with oxygen. 4 ko2(s) + 2 co2(g) n 2 k2co3(s) + 3 o2(g) what mass of ko2, in grams, is required to react with 8.90 l of co2 at 22.0 °c and 767 mm hg

52.0004 grams of mass of potassium superoxide  is required

Explanation:

Let moles carbon dioxide gas be n at 22.0 °C and 767 mm Hg occupying 8.90 L of volume.

Pressure of the gas,P = 767 mm Hg = 0.9971 atm

Temperature of the gas,T = 22.0 °C = 295.15 K

Using an ideal gas equation to calculate the number of moles.

n = 0.3662 mol

According to reaction, 2 moles of carbon-dioxide reacts with 4 moles of potassium superoxide.

Then 0.3662 mol of  of carbon-dioxide will react with:

of potassium superoxide.

Mass of 0.7324 mol potassium superoxide:

0.7324 mol × 71 g/mol = 52.0004 g

52.0004 grams of mass of potassium superoxide is required.