Question

Am test si am nevoie urgent de raport atomic, raport de masa si componenta procentuale pt hidroxid de calciu repede

Answer 1

Ca(OH)2
raport atomic Ca:O:H=1:2:2
raport de masa Ca:O:H=40:32:2=20:16:1
compozitie procentuala
MCa(OH)2=ACa+2×AO+2×AH=40+2×16+2×1+74g
74gCa(OH)2..............40gCa........32gO.......2gH
100gCa(OH)2...............xgCa..........ygO........zgH
x=100×40/74=calculeaza
y=100×32/74=calculeaza
z=100×2/74=calculeaza
succes la test!