The MAX17043G should respond only to default I2C address 36.
However, if you have the "E" version of the part(MAX17043G-E) then this variation of the part is intended to be used when there is already the standard MAX17043G IC in the same system and will have an alternate working I2C address.
The I2C address difference is as follows:
The I2C address of MAX17043G+U is 0110110 (6C read and 6D write)
The I2C address of MAX17043G-E is 0110010 (64 read and 65 write)