Bài 2 :
nH2 = 3/2 = 1,5 (mol)
PTHH : 2H2 + O2 -> 2H2O
Theo PTHH : nH2O = nH2 = 1,5 (mol)
nO2 = 1/2 . nH2 = 1/2 . 1,5 = 0,75 (mol)
a) mH2O = 1,5 . 18 = 27(g)
b) VO2 = 0,75 . 22,4 = 16,8 (l)
Bài 3 :
a) HCl
%mH = $\frac{1}{36,5}$ . 100% = 2,739%
%mCl = $\frac{35,5}{36,5}$ . 100% = 97,260%
b) HNO3
%mH = $\frac{1}{63}$ . 100% = 1,587%
%mN = $\frac{14}{63}$ . 100% = 22,222%
%mO = $\frac{16.3}{63}$ . 100% = 76,190%
c) H3PO4
%mH = $\frac{1.3}{98}$ . 100% = 3,061%
%mP = $\frac{31}{98}$ . 100% = 31,632%
%mO = $\frac{16.4}{98}$ . 100% = 65,306%
