Răspuns :
MNaOH=23+16+1=40
40 g NaOH...............16 g O
50 g NaOH..................x
x=(16*50)/40=20 g O
40 g NaOH...............16 g O
50 g NaOH..................x
x=(16*50)/40=20 g O
facem mai întâi masa atomică a hidroxidului de sodiu: A=32+32+2=66g.
in 66g SOH2...........32g S
dar in 50g SOH2......x g S
x=50×32 pe 50
x=32g.
raspuns: in 50g SOH2 se gasesc 32g S
in 66g SOH2...........32g S
dar in 50g SOH2......x g S
x=50×32 pe 50
x=32g.
raspuns: in 50g SOH2 se gasesc 32g S