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