At room temperature, sugar will generally dissolve in the water sample. The sugar molecule won't dissociate anything though since it's a molecular compound and not an ionic one. That is the general trend. There are some cases that may cause something else to happen. Should you have too much sugar and too little water, the solution would become saturated and no more sugar can dissolve so they'll just float around when this happens.
sugar increase density of the water so the seed floats
No, it will all dissolve eventually until no more can be added to the water, which is called saturation where it will start to settle in the bottom of the container after a certain amount of solute is added. But it does dissolve faster in hot water.
I assume that you mean 'dissolves in water'. The answer is yes, very much so. The higher the temperature of the water, the quicker the sugar dissolves. The reason for this is very simple. As the temperature increases, water molecules move more quickly as they have more energy. They are therefore more likely to collide with and 'attack' the sugar crystals, causing sugar molecules to separate from each crystal and disperse throughout the water forming a sugar solution.
The volume of a sugar and water mixture is less than the volume of each substance alone because when water is added to sugar, water fills in the little spaces between the particles of sugar, resulting in a lower volume.
It doesn't really disappear, it dissociates. Water is a solvent, and causes tons of stuff to separate, including sugar. Table sugar is not a single molecule (ie. glucose), but instead is a combination of carbon, hydrogen and oxygen (C12H22O11), and simply put, those pieces come apart in water giving the appearance of disappearing. (But they are actually only changing forms.)
The temperature increase a bit.
The sugar will dissolve in water because sugar is polar and so is water with hydrogen bonds. When attraction happens, the water molecules will separate the sugar molecules and the sugar will be dissolved.
The sugar solubility is increased.
it gets cooler
The temperature decrease and water can be transformed in ice.
Under normal conditions of temperature, nothing happens; water and neon do not react.
The sugar The sugar turns into its constituents. Sugar is made up of carbon and water. So when the sugar is heated, it turns into carbon and oxygen.The equation can be:-Sugar==>Carbon+Water
When silver is added to water, it does not react with the water. Silver is a noble metal and is relatively unreactive with water at room temperature.
When a spoonful of sugar is added to half a liter of cold water, the sugar dissolves into the water, resulting in a sweetened solution. The sugar molecules break down and integrate with the water molecules, creating a homogenous mixture.
When calcium chloride is added to water, it increases the temperature of the water. This is due to the exothermic reaction that occurs when calcium chloride dissolves in water, releasing heat in the process.
Its just water added with sugar.
The normal freezing temperature for pure water is 0c. Howeverif sugar is added in the pure water, the freezing point will be lower than zero. How far below zero will depend on the sugar concentration in the water.