Question

ajutor. Dau coroana ​

Answer 1

Răspuns:

1) KOH

MKOH=39+16+1=56g/mol

2) P2O5

MP2O5=2×31+5×16=142g/mol

3) CO2

MCO2=12+2×16=44g/mol

4)  Al2(SO4)3

MAl2(SO4)3=2×27+3×32+12×16=342g/mol

5) AlCL3

MAlCl3=27+3×35,5=133,5g/mol

6) HCl

MHCl=1+35,5=36,5g/mol

7) N2O3

MN2O3=2×14+3×16=76g/mol

8) Na2CO3

MNa2CO3=2×23+12+3×16=106g/mol

Explicație: