C6H10O5n→+nH2O,H+nC6H12O6;mC6H10O5)n=1000×0,8=800( g)

\({{\rm{n}}_{{{\rm{C}}_6}{{\rm{H}}_{12}}{{\rm{O}}_6}}} = {{\rm{n}}_{{{\left( {{{\rm{C}}_6}{{\rm{H}}_{10}}{{\rm{O}}_5}} \right)}_{\rm{n}}}}} = \frac(\;{\rm{mol}}) \Rightarrow {{\rm{m}}_{{{\rm{C}}_6}{{\rm{H}}_{12}}{{\rm{O}}_6}}} = \frac \times 180 \times \frac{{37,5}} = 333,3(\;{\rm{g}}) \approx 333\;{\rm{g}}\)