2so4 + nh3  hso4 - + nh4 + 12. h2so4 goes to hso4 - a) did it gain or lose a proton? b) is it a brønsted -lowery acid or base?

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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catya your not at all which answer i've seen you do this on another question!