Theo đề bài:
dX/H2 = 21 ==> X = 42
nX = m/M = 16.8/42 = 0.4 (mol)
VX = 22.4 x n = 22.4 x 0.4 = 8.96 (l)
Theo đề ta có: d\(\frac{hhX}{H_2}\) = 21 => MhhX = 21.2 =42(g/mol)
=> nhhX = \(\frac{16,8}{42}=0,4\left(mol\right)\)
=> VhhX = 0,4.22,4 =8,96 (l)
Vậy...
dX/H2=21
<=> MX= 21*2=42g/mol
nX= mX/MX= 16.8/42=0.4 (mol)
VX= 0.4*22.4=8.96l