101.3 mg sample of an organic compound known to contain Cl is burned in pure Oz2 and the combustion gases collected in absorbent tubes. The tube used to trap CO2 increases in mass by 167.6 mg, and of 121.8 mg is treated with concentrated HNO: producing C12, which subsequently reacts with Ag* forming 262.7 mg og AgCl. (MM of C= 12.01 g/mol, O=16.00 g/mol, Cl=35.45 g/mol, H=1.008 g/mol, AgCl=143.32 g/mol. Determine the: 1. % w/w C. 2. % w/w H. 3. % w/w CI 4. Empirical formula of compound.

Use the information about three gases, with the properties below to answer the following questions. Nitrogen (N2) Oxygen (02) Argon (Ar) 93.0 °C 83.0 °C 73.0 °C M (kg/kmol) 28 32 40 Use the van der Waals equation of state and mixing rules to calculate the temperature where 100 kmol of a mixture of argon (10 mol%), nitrogen (45 mol%) and oxygen (45 mol %) would occupy 46.27 m³, at a pressure of 6.28 MPa. It is known that the van der Waals constant for nitrogen are a=1.370 atm(m³/kmol)² and b=0.0387 m³/kmol, and for oxygen are a=1.382 atm(m³/kmol)² and b=0.03186 m³/kmol. 63.0 °C Tc (K) 126.2 154.6 150.8 Pc (atm) 33.5 49.8 48 @ 0.04 0.021 -0.004

3. The microstructure of a Cu-Ag alloy at 779°C consists of primary a (with mass fraction of 0.73) and eutectic structure (with mass fraction of 0.27). Determine the composition of this alloy. Temperature (°C) 1200 A 1000 Ⓒ 800 600 400 200 a C (Cu) B 8.0 (CE) -Solidus Solvus 20 20 a +L Composition (at% Ag) 40 -Liquidus 779°C (T) a+B 40 60 Composition (wt% Ag) T Liquid 60 71.9 (C₂) 80 80 B+L 91.2 (Cpg) 100 T 2200 G TITINTI B ++ H 2000 1800 F 1600 1400 1200 1000 800 600 400 100 (Ag) Temperature (°F)