What mass of boric oxide is formed from the decomposition of 10g BOH3?
The molar mass of boric oxide (B2O3) is 69.62 g/mol and of Boric acid (BOH3) is 61.83 g/mol. 10g of BOH3 is equivalent to approximately 0.162 moles. The stoichiometry relationship between BOH3 and B2O3 is 4:1, so the mass of B2O3 formed would be 0.648g.