[પરમાણ્વીય દળ: $K : 39.0\, u ; O : 16.0 \,u ; H : 1.0\, u ]$
so wt of solute $=6.5 \times 56$
$=364\, gm$
wt of solution $=1000+364=1364$
Volume of solution $=\frac{1364}{1.89} m \ell$
Molarity $=\frac{\text { mole of solute }}{ V _{\text {solution }} \text { in Litre }}$
$=\frac{6.5 \times 1.89 \times 1000}{1364}$
$=9.00$