Question

Cat oxid de magneziu se obtine prin arderea a 48 g de Mg?
B)cat O se consuma ?
Exprimati rezultatele in grame si moli.Cat oxid de magneziu se obtine prin arderea a 48 g de Mg?
B)cat O se consuma ?
Exprimati rezultatele in grame si moli.

Answer 1

     48g      yg       xg

   2 Mg +  O2 =2 MgO

  2.24g      32g    2 .40g

MMgO=24 + 16=40------>1mol=40g

MO2=2.16=32 ----->1mol=32g

x=48.2.40 :2.24=80 g MgO

nr. moli =n

n=m:M

n=80g : 40g/moli=2 moli MgO

Y=48.32 :2.24=32 g oxigen

n=m:M

n=32g : 32g/moli=1 mol oxigen