(1)v冰=m冰/p冰=9kg/(0.9×10³kg／m³)=0.01m³
(2)v冰=3dm³=0.003m³
m冰=p冰v冰=0.9×10³kg／m³X0.003m³=2.7kg
冰融化为水质量不变.m水=m冰=2.7kg