Question

Giúp em câu 6 nha mn

Answer 1

\(2M+xH2SO4-->M2\left(SO4\right)x+xH2\)

\(n_M=\frac{23,4}{M}\left(mol\right)\)

\(n_{M2\left(SO4\right)x}=\frac{52,2}{2M+96x}\left(mol\right)\)

Theo pthh

\(n_M=2n_{M2\left(SO4\right)x}\)

\(\Rightarrow\frac{23,4}{M}=\frac{104,4}{2M+96x}\Rightarrow104,4M=46,8M+2246,4x\)

\(\Rightarrow57,6M=2246,4x\Rightarrow M=\frac{2246,4x}{57,6}\)

\(x=1\Rightarrow M=39\left(K\right)\)

Vậy M là Kali

Answer 2

https://i.imgur.com/Os8A8At.jpg