Answer
See the answer below.
Work Step by Step
In 1 kg of water:
Number of moles: $1000\ g\div 18.015\ g/mol=55.51\ mol$
Volume: $1000\ g\div 0.997\ g/cm^3=1003.0\ cm^3=1.003\ L$
Molality: $55.51\ mol\div 1\ kg=55.51\ m$
Molarity: $55.51\ mol\div 1.003\ L=55.34\ M$