Răspuns:
Explicație:
6 g H
g H2O
-se afla masa molara a apei
M=2 +16= 18-------> 1mol=18 g H2O [ 18g/moli ]
18 g H2O----------2g H
x g --------------------6gH
x=18 . 6 : 2=54 g H2O
6gH
gPH3
M=31 + 3=34-------> 34g/moli
34g PH3----------3gH
yg---------------------6gH
y=34 . 6 : 3= 68 g H
6g H
gH2CO3
M=2 +12 + 3.16=52 --------> 62g/moli
62 g H2CO3-----------------2g H
zg-----------------------------------6gH
z=62 . 6 : 2=186 g H
