7.102 g of Na₂SO₄ (M = 142.04 g mol^–1) is dissolved in water to prepare \({\text{0.5000 d}}{{\text{m}}^{\text{3}}}\) of solution. What is the concentration of \({\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}\) in \({\text{mol}}\,{\text{d}}{{\text{m}}^{ - 3}}\)?

A.     \(2.500 \times {10^{ - 2}}\)

B.     \(1.000 \times {10^{ - 1}}\)

C.     \(1.000 \times 10\)

D.     \({\text{1.000}} \times {\text{1}}{{\text{0}}^{\text{2}}}\)

B