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. Starting with 6 moles of H and 10 moles of O, which substance would be limiting when the reaction 2H2+O2 → 2H2O occurs? a. O2 b. Not enough information to tell C. H2 9. Half-reactions are used to help in solving redox problems. In a certain problem, t Zn2+ + 2e-→ Zn came up. This half-reaction represents a. an oxidation b. the neutral zone c. a reduction d. electricity The partial pressures of a certain gas mixture containing nitrogen helium, and neon are the following: N 10. 0.15 atm; He 0.35 atm; and Ne 0.20 atm. The total pressure of the mixture is a. 0.70 atm b. 0.082 atm c. 0.011 atm d. 0.40 atm 11. What is the net ionic equation for the reaction Ba(NO,) (aq) + 2NaF(aq) BaF, (s)+ 2NaNO, (aq) a. Ba (aq) +2F(aq) BaF2(s) b. Ba.(aq) +2NO3(aq) → Ba(NO3 )2(aq) c. Na (aq) +F (aq)NaFaq) d. Na (aq) + NOj(aq)NaNO, (aq) A gas expands to fill its container. This fact can be explained by the fact that gas molecules a. b. 12. have varying masses. are in constant random motion. have a small volume. are relatively far apart. c. d. Multiple Response - 3 points each Identify one or more choices that best complete the statement or answer the question 13. Which of the following are not properties of an ideal gas? (Particles refers to the atoms, molecules, or ions that make up a gas.) a. Particles are tiny; i.e., they are far apart compared to their size. b. Particles are in fast, random motion. c. Particles lose energy when they collide. d. Particles have no repulsive forces between themselves. e. There are attractive forces between the particles. f. There are frequent collisions between particles.


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