cM=nr moli/volum=masa de substanta/(masa molara*volum)
=>volumul=nr moli/cM=masa de substanta/(masa molara*cM)
=>masa de substanta=masa molara*volum*cM
Aceasta este formula pe care trebuie sa o folosesti si o aplic direct
1)a)masa H2SO4=0,7*0,01*98*1000 (1m cub = 1000 l)=686 g acid
b)masa H2SO4=600*1,5*98=88200g=88.2 kg acid
c)masa H2SO4=(250*2*98)/1000 (1000ml=1l)=49 g acid
2)a)volum NaOH=4/2=2 litri hidroxid
b)volum NaOH=16/(0,2*40)=2 litri hidroxid
c)volum NaOH=8/(0,02*40*1000)=0,01litri=10 ml hidroxid