48.6
H-H-H-H72-H40
P260-P26-P264-P270-P27-P27-P280-P02+P2-P04+P40-P0+P+P8-P62+P64-P-P40+P2-P40-P0
质量 (g) = 浓度 (mol/L) × 体积 (L) × (g/mol)