Răspuns:
Explicație:
7 N H3 7 N 21 H M= 14 + 3= 17------> 17g/moli
3 H2 CO3 6 H 3C 9 O M= 2 + 12 + 3.16=62----> 62g/moli
5 C Cl4 5 C 20 Cl M= 12 + 4.35,5= 154 ----> 154g/moli
4 H2SO4 8H 4 S 16 O M= 2 + 32 + 4.16=98----> 98g/moli
6 SO3 6S 18 O M= 32 + 3.16= 80------> 80g/moli