Question

Calculati raportul Atomic , Raportul de masa si Compozitia procentuală ( H²SO4) si ( MgCl²) Am mare nevoie Dau 47 de puncte

Answer 1

H2SO4

Raportul atomic:
 
H:S:O=2:1:4

Raportul de masa: 

$m_{H}:m_{S}:m_{O}=2:32:64=1:16:32$

Compozitia procentuala:

$M_{H2SO4}=2*1+32+4*16=98$

2 g H...........32 g S..........64 g O............98 g H2SO4
   x.................y....................z.................100 g H2SO4

$x= \dfrac{2*100}{98}=2,04\ \% \ H$

$y= \dfrac{32*100}{98}=32,65\ \% \ S$ 

$z= \dfrac{64*100}{98}=65,31\ \% \ O$ 


MgCl2

Raportul atomic:

Mg:Cl=1:2

Raportul de masa:

$m_{Mg}:m_{Cl}=24:71$

Compozitia procentuala:

$M_{MgCl2}=24+71=95$

24 g Mg.........71 g Cl.........95 g MgCl2
   x.....................y...............100 g MgCl2

$x= \dfrac{24*100}{95} =25,26\ \% \ Mg$

$y= \dfrac{71*100}{95} =74,74\ \% \ Cl$