Question

sodium peroxide (Na2O2) is used to remove carbon dioxide from (and add oxygen to) the air supply in spacecrafts. it works by reacting with CO2 in the air to produce sodium carbonate (Na2CO3) and O2.

2 Na2o2(s) + 2 CO2(g) > 2 Na2CO3(s) + O2(g)

what volume (in liters) of CO2 can be consumed at STP by 715 g Na2O2?

Answer 1

Answer) weight of Mago, Cm) = 7159 Molar Mass of Na222 CM) = 47.98 g/mol moles of Na2O2 Ch) = m = 415g = 9.17 mole fonos) Now, 249,020) + 2C029 — 2 MQ, CO3 w) + O2G) 2 moles of Nazo reacts with 2 moles of coa 9.17 moles of Na2O2 reacts with ? moles of CO2 2 moles of cop required = 2x9.17 = 9.17 mole of con Now, according to ideal gas Eq" PV = nRT At STP T= 273.15k P= 1 atm TR=0.0821 h.athmollki V=nRT P u 9.17 Cmote) x 0.0821 CL atm mortk 273.15 CK) 1 Catm) V = 205.64L CS Scann