If enought heat was removed by water, its will probably evaporate or turn into steam.
We need to find mass number
Your answer is 40u
The melting point of the solid form of water, which is ice, is 0°C. When we convert both temperatures to kelvin by adding 273 to each we get the melting point of copper as 1357K and that of ice is 273K. Then, dividing the melting point of copper by the melting point of ice, both in absolute temperature scale. The answer would be 4.97. Thus, the energy of molecules of copper is approximately 5 times compared to that of water.
Mass number = number of protons + number of neutrons
mass number= 8 + 7= 15 ---> the answer is B.
