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The atomic mass of element B is 106.1 amu.
Given:
- The atomic mass of element A is 35.45 amu.
- A +B → AB
- 28.54 g sample of A combines with 85.42 g of another element B
To find:
The atomic mass of element B.
Solution:
The mass of element A = 28.54 g
The atomic mass of element A = 35.45 amu = 35.45 g/mol
Moles of element A :
=
A +B → AB
According to reaction, one mole of A combines with 1 mole of B , then 0.8051 moles of A will combine with:
Moles of B element = 0.8051 mol
Mass of element B used = 85.42 g
The atomic mass of element B =M
The atomic mass of element B is 106.1 amu.
Learn more about moles of substance here: