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2 answers:
Answer:
Molecular mass U2O5 = 556 g/mol
Explanation:
The atomic mass of an element expressed in amu (atomic mass units) is equal to the weight in grams of 1 mole of the corresponding element
i.e. amu = g/mole
The atomic weight of Uranium = 238 amu
Therefore, weight of 1 mole of Uranium = 238 g/mol
Weight of 1 mole of O = 16.00 g
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From the given balanced equation we have find out the amount (in gm) of Ag formed from 5.50 gm of Ag₂O.
2Ag₂O(s) → 4Ag (s) + O₂ (g)
We know, molecular mass of Ag₂O= 231.7 g/mol, and atomic mass of Ag= 107.8 g/mol. Given, mass of Ag₂O=5.50 gm. Number moles of Ag₂O== 0.0237 moles.
From the balanced chemical reaction we get 2 (two) moles of Ag₂O produces 4 (four) moles of Ag. So, 0.0237 moles of Ag₂O produces moles=0.0474 moles of Ag= 0.0474 X 107.8 g of Ag=5.11g Ag.
Therefore, 5.50 g Ag₂O produces 5.11 g of Ag as per the given balanced chemical reaction.