A rigid 2.00 L vessel at 298 K initially contains NH3(g) at 1.20 atm

CHEMISTRY · Single correct · AP · Chemistry · Chemical Reactions · Chemical Reactions

Problem

A rigid 2.00 L vessel at 298 K initially contains NH3(g) at 1.20 atm. The gas is allowed to dissolve into 250 mL of 0.200 M HCl(aq) present in the same vessel until the total pressure falls to 0.30 atm. The only reaction that occurs is NH3(g) + HCl(aq) → NH4Cl(aq) Assuming the volume of the solution remains 250 mL, what is the concentration of NH4Cl in the final solution? (a) 0.245 M0.245\,\text{M} (b) 0.098 M0.098\,\text{M} (c) 0.200 M0.200\,\text{M} (d) 0.196 M0.196\,\text{M}

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