no
yes
You could possibly arrange an experiment for different substances to melt and boil at the same time, but they would not do so at the same temperature. Different substances have different properties, they do not all melt and boil at the same temperature.
The temperature of the water and the temperature of the air would have to be factors in the answer. EDIT: Assuming the air and water are the same temperature, it would melt much faster in water. The thermal conduction is much higher.
No. Carbonated will melt in a shorter time than water. Carbonated drinks have dissolved carbonic acid in them, which will lower the freezing point. (This is similar to how adding salt to ice makes it melt at a lower temperature.) So, if two solutions are frozen at the same temperature and then thawed at the same temperature, the carbonated drink will melt first.
ice melt at 0 degrees and water freeze at the same temperature because it cool like that. xDThe real answer is because molecules of ice are constantly escaping into the water (melting), and molecules of water are being captured on the surface of the ice (freezing).
Assuming that the air and water in your question have the same temperature, ice would melt faster in the water, as there is a greater degree of heat transferance in water due to its greater density.
The same temperature it melts at out of a safe.
No, impure chemicals do not melt at the same temperature as pure chemicals. Impurities can disrupt the crystal lattice structure of a substance, causing the melting point to decrease or broaden. This results in impure substances melting at lower temperatures compared to their pure counterparts.
If the conditions are the same [temperature, pressure, presence or absence of dissolved substances,...] then they have the same density.
Salty water will generally melt faster than non-salty water. The presence of salt lowers the freezing point of water, causing it to melt faster when exposed to the same temperature. The salt disrupts the hydrogen bonding between water molecules, making it easier for them to break apart and melt.
The hot water would transfer heat to the ice, causing it to melt and eventually reach a point where the water temperature is equal throughout. This process involves the ice absorbing heat energy from the hot water until it reaches a thermal equilibrium.
Yes the melting and freezing points are the same.