Answer:
δ sln = 0.111 g/mL
Step-by-step explanation:
density (δ): mass/volume
⇒ δ ≡ g solute/mL H2O
∴ m NH4NO3 = 15g
∴ δH2O ≅ 1 g/mL
∴ V H2O = (135g H2O).( mL/1gH2O) = 135 mL H2O
⇒ δ sln = 15 g NH4NO3 / 135 mL H2O = 0.111 g/mL
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