Question

In cate grame de : a)H2O , b)PH3 , c)H2CO3 se gasesc 6 g de hidrogen?
Va rog!Am nevoie urgent!

Answer 1

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