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. m (HCl) =30.8 g .m (NH4Cl)=? The reaction is NH4Cl= NH3 + HCl Let's find the amount of substance (HCl)= m(HCl)/ Mr(HCl) Mr (HCl)= Ar(H)+ Ar(Cl)=1+35.5= 36.5 . n=30.8/36.5=0.84 mol . n (NH4Cl) = n(HCl)=0.84 mol .m (NH4Cl)= Mr(NH4Cl) *n (NH4Cl) Mr(NH4Cl)= Ar(N)+ 4 Ar(H)+ Ar (Cl)= 14+4+35.5=53.5 m (NH4Cl)=53.5 *0.84=44.94 g
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