To be able to answer this question, we just have to determine the heat of fusion of the water. From reliable sources, the heat of fusion of water is equal to 80 cal/g. Multiplying this value to the mass given,
Heat = (225 g)(80 cal/g)
= 18000 cal
Therefore, the amount of heat that must be removed is equal to 18000 cal or 18 kcal.
Evolution is a gradual change in the inherited traits of a population over many generations. Natural selection is a mechanism where the members of a population best suited to their environment have the best chance of surviving to pass on their genes.
Knowing that the number of protons of an element is equivalent to its atomic number, it can be determined from the periodic table of elements that this radiosonde is phosphorus. Since the number of its neutrons is 17, it can also be determined that its atomic mass is n + p = 15 + 17 = 32. This means the isotope is phosphorus-32.<span />