Question

Determinati masa molara,raportul atomic si raportul de masa pentru urmatoarele substante.​

Answer 1

Răspuns:

SO2

MSO2= AS+ 2×AO=32+2×16=64g/mol

raport atomic S:O=1:2

raport de masa S:O=32:32=1:1

NaOH

MNaOH =ANa+ AO+ AH=23+16+1=40g/mol

raport atomic Na:O:H=1:1:1

raport de masa Na:O:H=23:16:1

CuSO4

MCuSO4 =ACu+ AS +4×AO=64+32+4×16=160g/mol.

raport atomic Cu:S:O=1:1:4

raport de masa Cu:S:O=64:32:64=2:1:2

HNO3

MHNO3 =AH+AN+3×AO=1+14+3×16=63g/mol

raport atomic H:N:O=1:1:3

raport de masa H:N:O=1:14:48

MgCl2

MMgCl2 =AMg+2×ACl=24+2×35,5=95g/mol

raport atomic Mg:Cl=1:2

raport de masa Mg:Cl=24:71

CaCO3

MCaCO3 =ACa+AC+3×AO=40+12+3×16=100g/mol

raport atomic Ca:C:O=1:1:3

raport de masa Ca:C:O=40:12:48=10:3:12