The atomic mass of a metal M is 56. Calculate the empirical formula of its oxide containing 70 % metal.

The atomic mass of a metal M is 56. Calculate the empirical formula of

1.	The atomic mass of a metal M is 56. Calculate the empirical formula of its oxide containing 70 % metal.
Answer» Solution :Empirical formula may be calculated as : `{:("Element","Percentage","Atomic mass","GRAM ATOMS (Moles)","Atomic RATIO (Molar ratio)","Simplest whole no. ratio"),("M",70.0,56,(70.0)/(56)=1.25,(1.25)/(1.25)=1.0,2),("O",30.0,16,(30.0)/(16)=1.88,(1.88)/(1.25)=1.5,3):}` Empirical formula of METAL oxide `= M_(2)O_(3)`.