Question

12) An aqueous solution with a concentration of 12.5 ppb indicates that there is liter of solution. 12) - per ULTIPLE CHOICE. Choose the one alternative that best completes the statement of an 13) Which monomer is polymerized to make polyethylene? A) isoprene 3) styrene C) urethane mentor answers the question. 13) D) propylene E) ethylene 14) Which of the following salts will produce a basic solution? A) NaBr B) NH4NO3 C) KNO3 D) Na2SO3 E) Mg(CIO4)2 15) Which of the following has the largest entropy at 25°C and atm? A) CH4 B) H2 CO2 D) F2 E) N2 16) Elemental iodine (12) is a solid at room temperature. What is the major attractive force among different 12 molecules in the solid? A) dipole-dipole attractions B) dipole-dipole interactions C) covalent-ionic interactions D) ionic-dipole interactions E) London dispersion forces Ammonia is a A) weak acid B) weak base C) salt D) strong acid E) strong base The pH of a solution prepared by mixing 45.0 mL of 0.183 M KOH and 45.0 mL of 0.145 M HCl is 18) A) 12.923 B) 12.280 C) 1.720 D) 1.314 E) 0.00824 phases of matter. 19) ogether, liquids and solids constitute A) all of the B) the disordered C) the fluid D) the compressible E) the condensed

Answer 1

solutions : 12) 12.5 ppb indicats that there is (1.25x10 9 Liters as a soluti per liter of solutions 13) E) ethyline Explanations: n CH2 = CH2 emylne » (CH2-CH2-Cha-chat Polyethylene 19) (D) Naz sog Explanations. It is a salt af strong base naoh and weak and H2S. ? Mazsola, 1920 2 aones & H25039 i shaybase wealcarich basic solutions Entropy is a measure af randomners. Entropy a molamars

16) LE) London dispersions forces / Explanates :- 1-1 Pure Covalint Molecale (non polar) 17) | B) wears base) , Ky, ang = 1.8810

- 18) mots of ison = u540-183 = 0.008235 100 mot af reu= u580.145 =0.0.006525 10 Kon the ku theo : mob af kon left = 0.008235 -0.006525 = 0.0011 volume= u5745-90 mL = 0.092 - molarity of kon = 0.00171 - 0.019 long = 1.721 apr=14-1-721 = 12.279 Answer: [B) 12-280 0.09. . 19) E) the condensed