Răspuns:
1 Raportul atomic
C:O
1:2 un atom C raportat la 2 atomi O
Raportul de masa
C:O
1*12:2*16 =12: 32
2.MNaCl = 1*23+1*35=23+35=58g/mol
58gNaCl............23g Na.......... 35g Cl
100gNaCl..........xg Na.............. yg Cl
X=23*100/58
X=39, 65 g Na
Y=35*100/58
Y=60,34 g Cl
3.MH2So4=2*1+1*32+4*16=2+32+64=98g/mol
98g H2So4................. 32g S
100g H2So4................ Xg S
X=32*100/98
X= 32,65 g S
Sper sa te ajute!
