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1. |
An unsteady state system, the flow in rate of A is 6 mole/s, what is the flow out rate of B if the accumulation was 18 mole in 9 seconds? |
A. | 1 mole/s |
B. | 2 mole/s |
C. | 3 mole/s |
D. | 4 mole/s |
Answer» E. | |