20.23
H226-H30+H33-H38-H373
P20-P233-P240-P24-P242-P243-P260-P26-P264-P270-P27-P280-P303+P36+P353-P304+P340-P305+P35+P338-P330-P370+P378-P403+P233-P403+P235-P405-P50
3 (6.)
986
质量 (g) = 浓度 (mol/L) × 体积 (L) × (g/mol)