Two isotopes of element X have average atomic mass of 54 amu. Which numerical setup can be used to determine the atomic mass of naturally occurring boron? 1)80% of 50X and 20% of 55
2)20% of 50X and 80% of 55X
3)50% of 50X and 50% of 55X
4)75 of 50X and 25% of 55X

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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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