A standard 'molal' concentration is $\text{moles solute} / \text{kg solvent}$. If $10 \text{ g}$ of $\text{NaCl}$ (molar mass $58.44 \text{ g/mol}$) is dissolved in $500 \text{ mL}$ of water (density $1 \text{ g/mL}$), what is the molality?