2.03
H227-H30+H3+H33-H373-H42
P20-P260-P26-P264-P270-P27-P273-P280-P302+P352-P304+P340-P330-P36+P364-P370+P378-P403-P405-P50
6.
280
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质量 (g) = 浓度 (mol/L) × 体积 (L) × (g/mol)