Alexa, the voice service that powers Echo, provides capabilities, or skills, that enable customers to interact with devices in a more intuitive way using voice. Examples of these skills include the ability to play music, answer general questions, set an alarm or timer and more.
1 Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions. 2  The amount of a substance that can dissolve in a liquid (at a particular temperature) is called the solubility of the substance.
1 A salt is soluble if it dissolves in water to give a solution with a concentration of at least 0.1 moles per liter at room temperature. 2  A salt is insoluble if the concentration of an aqueous solution is less than 0.001 M at room temperature.