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1. |
What is the composition of the O2 gas on an SO2-free basis? |
A. | 0.78 and 0.22 |
B. | 0.22 and 0.78 |
C. | 0.70 and 0.25 |
D. | 0.25 and 0.78 |
Answer» B. 0.22 and 0.78 | |