Consider the following reaction sequence in which \( J \), \( K \), \( L \) and \( M \) are the major products.
Given:
Atomic mass (in amu): \( \text{H} : 1 , \; \text{C} : 12 , \; \text{N} : 14 , \; \text{O} : 16 , \; \text{S} : 32 , \; \text{Br} : 80 , \; \text{Ba} : 137 \)
In sulphur estimation by Carius method, the amount of \( \text{BaSO}_4 \) formed from \( 3.79 \, \text{g} \) of \( M \) is _______ \( \text{g} \).
