Answer
220 mL of a $0.90\%$ (m/v) NaCl solution.
Work Step by Step
$0.90\%$ (m/v) $ NaCl $ solution : $$ 0.90 \space g \space NaCl = 100 \space mL \space solution$$
$$2.0 \space g \space NaCl \times \frac{100 \space mL \space solution}{0.90 \space g \space NaCl} = 220 \space mL \space solution$$
