The chemical formula of the compound of strontium and chlorine would be SrCl2. It is a salt of the strontium ion and chloride ion and a white crystalline compound. When burned, it produces a bright red hue. That is why it found some application in fireworks.
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Speed of a radio wave in vacuum/air is 3x10^8 m/s. so, if speed is also distance/time, then time = distance/speed = 400,000/300,000,000 = ????
Crushing particles of solute. The more surface area of the solute exposed to the solvent the faster the solute will dissolve and react with the solvent
