An unknown liquid (A) showed no IR absorption between 1500 and 2500 cm-1. Similarly, there was no absorption above 3000 cm-1. Compound A reacted with alcoholic silver nitrate to give cloudiness after several minutes and it also reacted with sodium iodide in acetone to give a precipitate after several minutes. What conclusion can be made about the identity of compound A

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.