It is b, i learned this last year hope this helps
Hope this help‼️Enjoy your day
A glow stick contains two chemicals and a suitable dye (sensitizer, or fluorophor). This creates an exothermic reaction. The chemicals inside the plastic tube are a mixture of the dye and diphenyl oxalate. The chemical in the glass vial is hydrogen peroxide.
C6H6 + 15/2O2 = 6CO2 + 3H2O/×2
2C6H6 + 15O2 = 12CO2 + 6H2O
6.17749 would be the mass