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1. what is the name and formula for a compound with a composition percent of 77.7% Fe, 22.3% O and a molar mass of 71.85

2. what is the name and formula for a compound with A composition percent of 86.6% Pb, 13.4% O and a molar mass of 239.20

3.what is the name and formula for a compound with A composition percent of 85.0% Hg and 15.0% Cl and a molar mass of 472.08

4. what is the name and formula for a compound with A composition percent of 22.6% P, 77.4% Cl and a molar mass of 137.32

 

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