Chemistry, 22.07.2021 16:30, jadacherry

Why is the average atomic mass used when calculating grams of a substance? O A. The number of isotopes in the sample is constantly changing. B. The average atomic mass is known to more significant figures. O C. The elements in the substance are mixtures of their isotopes. O D. The exact weights of the isotopes are not known.

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Why is the average atomic mass used when calculating grams of a substance? O A. The number of isotop...