\(n_{H_2}=\dfrac{0,7437}{24,79}=0,03(mol)\\ a,PTHH:2R+6HCl\to 2RCl_3+3H_2\\ \Rightarrow n_{R}=\dfrac{2}{3}n_{H_2}=0,02(mol)\\ \Rightarrow M_{R}=\dfrac{0,54}{0,02}=27(g/mol)\)
Vậy R là nhôm (Al)
\(b,n_{AlCl_3}=n_{R}=0,02(mol)\\ \Rightarrow C_{M_{AlCl_3}}=\dfrac{0,02}{0,05}=0,4M\)
1bar=0,987atm
\(n=\dfrac{P\cdot V}{R\cdot T}=\dfrac{0,987\cdot0,7437}{0,082\cdot\left(25+273\right)}=0,03mol\)
\(2R+6HCl\rightarrow2RCl_3+3H_2\)
0,02 0,02 0,03
\(M_R=\dfrac{m_R}{n}=\dfrac{0,54}{0,02}=27đvC\)
\(R\) là \(Al\)
\(C_{M_{RCl_3}}=\dfrac{n}{V}=\dfrac{0,02}{0,05}=0,4M\)