S Salam I New member Sep 18, 2009 #1 4. . A certain metal, M forms two oxides M2O and MO. If the percent by mass of M in M2O is 76.0 % what is the percent by mass of M in MO
4. . A certain metal, M forms two oxides M2O and MO. If the percent by mass of M in M2O is 76.0 % what is the percent by mass of M in MO