Answer:
You have to know what the three sates of matter are
Explanation:
An exothermic reaction is a chemical reaction that releases energy through light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation: reactants → products + energy.
sand and ammonium chloride are insoluble in water but sodium chloride is soluble in water .ammonium chloride sublimates. so you first heat the mixture in a beaker covered with a watch glass then the ammonium chloride will accumulate on the watch glass leaving a mixture of sodium chloride and sand you then dissolve the mixture then filter using a beaker and a filter paper the filtrate is salt solution while the residue is sand you then evaporate the salt solution to remain with salt
Answer:
Metals are good conductors of heat and electricity, and are malleable (they can be hammered into sheets) and ductile (they can be drawn into wire). Most of the metals are solids at room temperature, with a characteristic silvery shine (except for mercury, which is a liquid). Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids.
Explanation: