Răspunsuri

2014-05-14T15:48:36+03:00
18 g H2O....2 g H
x g H2O.....6 g H        x = 54 g H2O
98 g H3PO4.....3 g H
x g H3PO4......6 g H        x = 196 g H3PO4
masa molara apa = 2+16=18g/mol
masa molara acid = 3+31+4*16=98g/mol