(પરમાણ્વીય દળ, $Ba=137\,amu, Cl=35.5\,amu$)
Weight of anhydrous \(BaCl_2 = 52\,g\)
Loss in mass \(= 9\,g\)
Assuming \(BaCl_2.xH_2O\) as hydrate mass of \(H_2O = 9\,g\)
Moles of \({{H}_{2}}O=\frac{9}{18}=0.5\)
Grass molecular let of \(BaCl_2 = 208\)
\(\%\) of \(H_2O\) in this hydrated \(BaC{{l}_{2}}=\frac{9}{61}\times 100\)
\(=14.75\%\)
\(=\frac{18x}{208+18x}\times 100\) on solving \(x = 2\)
This percentage is present in \(BaCl_2.2H_2O\)
($H _{2} O _{2}$નું આણ્વિય દળ $=34$ $;$ $KMnO _{4}$નું આણ્વિય દળ $=158$)
$I.$ ઓક્સિજનનો એક અણુ
$II.$ નાઇટ્રોજનનો એક અણુ
$III.$ $1\times10^{-10}$ મોલ ઓક્સિજન
$IV.$ $1\times10^{-10}$ મોલ કોપર