Tzumpi27ask
a fost răspuns

In cate grame de :
a) H2O  b) PH3   c) H2CO3 
se gaseste 6 grame de hidrogen ?

Răspuns :

Sudoku95ask
in 18 g H2O........2 g H
in x g H2O..........6 g H        x = 54 g H2O

in 17 g PH3.........3 g H
in y g PH3...........6 g H       y = 34 g PH3

in 62 g H2CO3........2 g H
in z g H2CO3.........6 g H      z = 186 g H2CO3