Reacted? Stoichiometry In space vehicles, air purification for the crew is partl

Question

Reacted? Stoichiometry In space vehicles, air purification for the crew is partly accomplished with the use of lithium peroxide, Li_2O_2. It reacts with waste CO_2 in the air according to the following equation: How many grams of oxygen can be released by the reaction of 0.905 grams of CO_2? The mineral stibnite, antimony III sulfide, is treated with hydrochloric acid to give antimony III chloride and hydrogen sulfide gas. What volume of hydrogen sulfide gas will be produced at 275degreeC and 1.50 atmospheres when 30.0 grams of stibnite is

Explanation / Answer

1) 2CO2 releases 1O2

CO2 moles = CO2 grams / Molar mass of CO2 = 0.905/44 = 0.020568

moles of O2 produced = CO2 moles/2 = 0.020568/2 =0.010284

O2 mass in grams = moels of O2 x moalr mass of O2 = 0.010284 x 32= 0.329 g

2) Sb2S3 mass = 30 g

S2S3 moles = mass / molar mass of Sb2S3 = 30/339.715 = 0.0883

as per reaction H2S moles = Sb2S3 moles reacted = 0.0883

T= 275 C = 275+273 = 548 K , P = 1.5 atm

we use PV = nRT equation

1.5 x V = 0.0883 x 0.08206 x 548

V = volume of H2S = 2.647 L

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