A gas mixture input is given to a membrane with 40% O₂ and 60% N₂, the waste contains 80% of the input and the product contains 25% O₂ and 75% N₂, what is the percentage of O₂ in the waste?

A gas mixture input is given to a membrane with 40% O₂ and 60% N₂,

1.	A gas mixture input is given to a membrane with 40% O₂ and 60% N₂, the waste contains 80% of the input and the product contains 25% O₂ and 75% N₂, what is the percentage of O₂ in the waste?
A.	0.22
B.	0.44
C.	0.66
D.	0.88
Answer» C. 0.66

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