Solution:
The given data are:
Maximum extent of reaction
The limiting reagent is the atom. The amount of formed will also be 0.012 mol. Mass of formed is . Hence
This gives Thus, atomic mass of B is .
. Reaction of of atoms of , and of yields of compound . If the atomic masses of and are and , respectively, the atomic mass of is
The given data are:
Maximum extent of reaction
The limiting reagent is the atom. The amount of formed will also be 0.012 mol. Mass of formed is . Hence
This gives Thus, atomic mass of B is .