how many address Wire library can it be?

Using Arduino Programming Questions
#1

here the answer is 8 addresses (0-7)
(Addressing – I2C Bus)

is the same to Wire.h library?

is there a possibility of having more?

#2

Are you confusing seven bits (128 addresses plus read/write) with eight addresses?

#3

There are a few reserved addresses, some details - Gammon Forum : Electronics : Microprocessors : I2C - Two-Wire Peripheral Interface - for Arduino

#4