Объяснение:
H2S+2NaOH=Na2S+2H20 m(NaOH)=400g*5%/100%=20g n(NaOH)=20g/40g/mol=0,5mol m(Na2S)=0,25mol*78g/mol=19,5g
n(H2S)5,6l/22,4l/mol=0,25mol
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Объяснение:
H2S+2NaOH=Na2S+2H20 m(NaOH)=400g*5%/100%=20g n(NaOH)=20g/40g/mol=0,5mol m(Na2S)=0,25mol*78g/mol=19,5g
n(H2S)5,6l/22,4l/mol=0,25mol