Answer:
It matters
Explanation:
Pure substance are known to have a sharp freezing point. However, the presence of solute lowers the freezing point of the solvent. The best time to measure the freezing point is when the freezing process is just beginning.
It will be an error to measure the freezing point when the part of the solution has already frozen.
Francium is the heaviest of the alkali metals, with an atomic mass of 223 grams.
A dog with a fifth leg or someone with and extra finger
It would be:
2H2 + O2 -> 2H2O