Question

16) Determine the concentration of a solution prepared by diluting 20.0 mL of 0.200 mol L-1 NaCl to 250.0 mL A) 0.00800 mol L-1 B) 2.50 mol L-1 C) 0.0320 mol L-1 D) 0.0160 mol L-1 E) 0.320 mol L-1 F) 0.160 mol L-1 17) A 0.334 g sample of an unknown halogen occupies 109 mL at 398 K and 1.43 bar. What is the identity of the halogen? A) F2 B) Cl2 C) 12 D) Br2 E) At2 F) None of the above

Answer 1

16. DILU HON LAu M, V,MV IIHA molR I M 0.200 m LT ANA veumE 2S7.0mL AN mmIT M MV O 200 mot 2 5D 0 mL My O 0160 mot L न) PV nRT LDEML GAS LAW 1.y3 bar x 0. 9863 al I bar .43 bar PRESSURE, P -4113 alm volumE, v 109 ml - 0.i03 L 1og mL x 0. 001 L TEmpERATUAE T 398K HalogeN MASS OF NO-Of moles o louEN, MolR MASE ophloGEn .413 am x 0 108L- O»334 9 x 0 0e206Lahx398 k K.md X Molr MASS ०.१ ৫ln MolaR m of 4roGen Fo. g lme mole mS of ch ANS