va rog imi trebuie urgent .dau si coroana
Răspunsuri la întrebare
CaCO3
M=40 +12 + 3.16=100-------> 100g/moli
100 g CaCO3-----------------40g Ca ----------12gC -----------48g O
100g----------------------------------x-------------------y--------------------z
x=100.40 :100=40% Ca
y=12% C
z=48% O
H2SO4
M=2+ 32 + 4.16=98--------> 98g/moli
98g H2SO4---------------2g H---------32g S-------------64 g O
100g-----------------------------x--------------y--------------------z
x=100 .2 : 98=
y=100 .32 : 98=
Z=100.64 : 98=
Na2CO3
M=2.23 + 12 + 3.16 = 106--------> 106g/moli
106g Na2CO3-----------46g Na-------------12g C-----------48g O
100g-----------------x--------------------y---------------------z
x=100.46 : 106=
y=100.12 : 106=
z=100.48 : 106=
Mg( NO3 )2
M=24+ 2.14 +6.16=148-------->148g/moli
148g Mg(NO3)2----------24gMg------------28g N----------------96g O
100g-----------------------------x----------------------y------------------------z
x=100.24 : 148=
y=100.28 : 148=
z=100.96 : 148=