Final answer:
The correct unit for the amount of energy needed to melt ice is in energy units, commonly joules (J), though kilojoules (kJ) or calories (cal) can also be used.
Step-by-step explanation:
The amount of energy needed to melt 75g of ice is 25,050. The correct unit for energy is typically expressed in joules (J) in the International System of Units (SI). However, as seen in the context of melting ice, energy can also be expressed in kilojoules (kJ) or calories (cal). The heat of fusion (the energy required to change a substance from solid to liquid at its melting point) of water is a known value and when using this information to calculate the energy needed for melting, the result will be in the form of energy units like J, kJ, or cal/g. Therefore, even though the exact unit is not provided in the question, it is implied that the amount of energy is in a unit of energy, likely joules.