13. A 50.0 mL sample of 0.436 M NH4NO3 is diluted with water to a total volume of 250.0 mL. What is the ammonium nitrate concentration in the resulting solution?
(A) 21.8 M
(B) 0.459 M
(C) 2.18 × 10–2 M
(D) 8.72 × 10–2 M

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