The molarity of $0.006 \ mol$ of $NaCl$ in $100 \ mL$ solution is (in $M$)

$248 \ g$ of ethylene glycol $(C_2H_6O_2)$ is added to $200 \ g$ of water to prepare antifreeze. What is the molality of the resultant solution (in $m$)? $(C=12 \ u, H=1 \ u, O=16 \ u)$

The density of '$x$' $M$ solution ('$x$' molar) of $NaOH$ is $1.12 \ g \ mL^{-1}$. While in molality,the concentration of the solution is $3 \ m$ $(3 \ molal)$. Then '$x$' is.
(Given: Molar mass of $NaOH$ is $40 \ g \ mol^{-1}$)

Which of the following concentration terms is dependent on temperature?

What is the mole fraction of the solute in a $1 \, m$ (molal) aqueous solution?

What type of solution is obtained from an amalgam of mercury with sodium?