Fill in the blanks given below:
$(i)$ The mass of $1$ mole of a substance expressed in grams is called its .........
$(ii)$ The amount of solute dissolved in $1$ $kg$ of solvent is called its .........
$(iii)$ The Fahrenheit scale in a thermometer is marked between .........
$(iv)$ In $NaCl$,each $Na^{+}$ ion is surrounded by ......... $Cl^{-}$ ions.

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(N/A) $(i)$ Molar mass
$(ii)$ Molality
$(iii)$ $32^{\circ}F$ to $212^{\circ}F$
$(iv)$ $6$

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