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BQ27741 questions

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hello, I have a few questions about the BQ27741 chip:

1.  what is the best resistance for the sense resistor if my max current is 10A?  The datasheets don't seem to discuss it.  The reference design uses 5m-ohm for 2A max. 

2.  Is the I2C address fixed at 0xAA?  can this be modified?

3.  Can I have a master-slave I2C bus architecture, where I have 5 BQ27741 slaves and 1 master processor?  Are there any design examples of this? if I have 5 cells in series, how do I handle the different voltage levels of each cell with respect to the processor GND? 

thanks


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