How frequent bytes and address lines are within a 256Kx16 rom chip?

I know that 1 K accounts for A9:0 = 2^10, but what's the rest.. high-speed 10 pts for first complete answer, thank you

How frequent bytes and address lines are within a 256Kx16 rom chip?

The chip is accessed 16 bits at a time, so the number of bytes (8 bits) is 512K bytes. However, since it's access 16 bits at a time (x16) 18 address lines are needed.

log(256 * 1024) / log(2) = 18 find a cheap rental car