2.4
H22-H01+H11+H1-H70
P2-P2-P240-P241-P242-P24-P260-P261-P264-P270-P271-P280-P02+P2-P0+P61+P-P04+P40-P08+P11-P0-P61+P64-P70+P78-P40+P2-P40+P2-P40-P01
120
质量 (g) = 浓度 (mol/L) × 体积 (L) × (g/mol)