\(n_{PbO}=\dfrac{21,7}{223}=0,097mol\)
\(PbO+H_2\rightarrow\left(t^o\right)Pb+H_2O\)
0,097 0,097 0,097 ( mol )
\(V_{H_2}=0,097.22,4=2,1728l\)
\(m_{Pb}=0,097.207=21,079g\)
nPbO = 21,7 : 223 = 0,097 (mol)
pthh : H2 + PbO -t--> H2O + Pb
0,097<--0,097---------------->0,097 (mol)
=> VH2 = 0,0,97 .22,4 = 2,172 (l)
=> mPb = 207 . 0,097 = 21,07 (g)