I believe the answers are
1) D
2) B
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Answer:
270
Explanation:
Once you add more mass to something the mass doesn’t go away you add more mass.
hope this helps!
The average atomic weight is the average of weighted mass of a particular atom.
The weighted average mass of the atoms in a naturally occurring sample of an element is the average atomic mass, also known as atomic weight.
The average mass of an element's atoms expressed in atomic mass units is known as its atomic mass (amu, also known as daltons, D). The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element.
Therefore, the average atomic weight is the average of weighted mass of a particular atom.
Learn more about atomic weight here;
brainly.com/question/19756221
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Answer:
there are 13 moles in the compound