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ce cantitate de Mg reactioneaza la 200g H2So4 deconcentratie 48%?!!?

Răspuns :

C=md/ms*100=>md=C*ms/100=48*200/100=96g H2SO4

MH2SO4=2AH+AS+4AO=2*1+32+4*16=98g/mol

MMg=24g/mol

Mg + H2SO4 => MgSO4 + H2

24g Mg...................98g H2SO4
xg.............................96g H2SO4

x=24*96/98=Calculeaza!!