A) Pb(NO3)2+Na2S=PbS+2NaNO3
Б) 2NaNO3+CaBr2=2NaBr+Ca(NO3)2
B) 2HNO3+K2SO3=K2SO4+2NO2+H2O
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Answers & Comments
A) Pb(NO3)2+Na2S=PbS+2NaNO3
Б) 2NaNO3+CaBr2=2NaBr+Ca(NO3)2
B) 2HNO3+K2SO3=K2SO4+2NO2+H2O