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Question

Some older emergency oxygen masks containing potassium superoxide (KO2)) react with CO2 and water in exhaled air to produce oxygen according to the given equation.
4KO2+2H2O+4CO24KHCO3+3O2
If a person exhales 0.667 g of CO2 per minute, how many grams of KO2 are consumed in 5.0 minutes?  


A
10.7
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B
0.0757
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C
1.07
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D
5.38
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Solution

The correct option is D 5.38
The number of moles of CO2 exhaled in 5 minutes.
=5×0.66744
. .. 4 mole of KO2 consumed by 4 mole CO2
 mass of KO2=5×0.66744×71=5.38g

Chemistry

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