Transformi fiecare masa in moli pt ca sti ca intr-un mol de orice subst se afla 6,023 * 10 la 23 molecule
a)x moli........3 * 6,023
1 mol.........6,023 x=3 adevarat,corect pt ca ai 3 moli HCl
b)1 mol..........6,023
y moli .........3 * 6,023 y=3 moli adevarat pt ca 132/44=3 moli CO2
c)1 mol......6,023
z mol.........3 * 6,023 z = 3 moli adevarat pt ca 67,2/22.4 = 3 moli O2
d)1 mol.......6,023
a moli........3 * 6.023 a=3 moli adevarat pt ca 51/17=3 moli NH3