Answer
$$Mass \space percent (m/m) = 3.4 \space \% \space NaCl \space solution$$
Work Step by Step
$$Mass \space percent (m/m) = \frac{grams \space of \space solute}{grams \space of \space solution} \times 100\%$$ grams of solution = grams of solute + grams of solvent
grams of solution = $2.0 \space g + 56.0 \space g = 58.0 \space g$ $$Mass \space percent (m/m) = \frac{2.0 \space g \space NaCl}{58.0 \space g \space solution} \times 100\%$$ $$Mass \space percent (m/m) = 3.4 \space \% \space NaCl \space solution$$
