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Help with this chemistry question.

Help with this chemistry question.-example-1
User Benzen
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Answer:

The average atomic mass will be closer to 7 amu, the average atomic mass of lithium is 6.94 amu and it is the same as the atomic mass on the periodic table.

Step-by-step explanation:

User Doekman
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Answers:

The average atomic mass will be closer to 7 amu, the average atomic mass of lithium is 6.94 amu and it is the same as the atomic mass on the periodic table.

Explanations:

We can predict that the average atomic mass will be closer to 7 amu because Li-7 has a much higher abundance on earth than Li-6.

To get the average atomic mass using isotopes, we must multiply the mass of each isotope by its natural abundance and then add the products.

(6.0151223 × 0.075) + (7.0160041 × 0.925)

= 0.45 + 6.49

= 6.94 amu

Our calculated average atomic mass is the same as the atomic mass on the periodic table.

User Rahul Biswas
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