Question

6. Circle the mathematical relationship that expressers (B) PV PN (D PV/T P/Tr . A sample of a gas in a can has a pressure measured as 1.06 atm and ermperature is 240C. The gas is heated and temperature rises to 56A0C. The new pressure is: (A) 2.49 atm (B) 2.50 atm (C) 2.99 atm (D) 24.9 atm 8. Th in 500. mL of solution is e molarity (Mn of a solution of 35.0 grams of potassium hydroxide (KOH) (A) O. 125 M KOH (B) 1.25 М КОН (О 1.35 M KOH (D) 0.135 M KOH 9 The densities of four metals are given below: When an unknown metal of mass 23.7 g is placed in a graduated cylinder containing water, the water level in the cylinder rises from 11.00 mL to 24.62 mL. Based on the densities given above, this unknown metal's density is: (A) 1.74 g/mL: (B) 7.87 g/mL (C) 2.70 g/mL (D) 11.3 g/mL 10. The first law of thermodynamics (B) (D) defines enthalpy A) defines chemical energy. defines conservation of energy (C) defines entropy 11. Which of the following reactions (processes) is (are) Exothermic? I N20s (+H2O ()-2 HNOs() 18.3 kcal II. 2 NHs (g)+ 22 kcal (g)N2 (g) + H2 (gl 111. N2(g) + 2 O2 (g) + 16.2 kcal → 2 NO2 (g) S(s) + O2 (g)-→ SO2 (g) + 71 kcal (A) II and IV (B) Il and III (C) I and IV (D) I and III 12. Based on the Lewis electron dot representation of CBr, the molecular shape is: (A) tetrahedral B) Trigonal planar (C) Trigonal pyramidal (D) Bent
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