D Question 31 N₂ (g) Which is the sum of the coefficients when the reaction below is balanced using lowest, whole-number coefficients? ..... I₂ (g) +..... N₂ H₁ (9) HI (g) +..... 09 07 08 06

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
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**Question 31**

Which is the sum of the coefficients when the reaction below is balanced using the lowest, whole-number coefficients?

\[I_2 (g) + N_2H_4 (g) \rightarrow HI (g) + N_2 (g)\]

- [ ] 9
- [ ] 7
- [ ] 8
- [ ] 6

**Question 32**

At which point in the phase diagram below can one observe freezing and boiling simultaneously?

(Note: The actual phase diagram is not shown in the image provided; typically, this would involve a point such as the "triple point" where solid, liquid, and gas phases coexist.)

Educational Explanation for Students:

- **Balancing Chemical Equations (Question 31)**: To balance a chemical equation, you need to ensure that the number of atoms for each element and the total charge are the same on both sides of the equation. The sum of the coefficients refers to the total number of molecules or atoms involved once the equation is balanced.

- **Phase Diagrams and State Equilibrium (Question 32)**: Phase diagrams illustrate the state of a substance (solid, liquid, gas) at various temperatures and pressures. The triple point on a phase diagram is where the three phases of matter coexist in equilibrium. It’s a unique condition where freezing (solidification) and boiling (vaporization) can happen simultaneously.
Transcribed Image Text:**Question 31** Which is the sum of the coefficients when the reaction below is balanced using the lowest, whole-number coefficients? \[I_2 (g) + N_2H_4 (g) \rightarrow HI (g) + N_2 (g)\] - [ ] 9 - [ ] 7 - [ ] 8 - [ ] 6 **Question 32** At which point in the phase diagram below can one observe freezing and boiling simultaneously? (Note: The actual phase diagram is not shown in the image provided; typically, this would involve a point such as the "triple point" where solid, liquid, and gas phases coexist.) Educational Explanation for Students: - **Balancing Chemical Equations (Question 31)**: To balance a chemical equation, you need to ensure that the number of atoms for each element and the total charge are the same on both sides of the equation. The sum of the coefficients refers to the total number of molecules or atoms involved once the equation is balanced. - **Phase Diagrams and State Equilibrium (Question 32)**: Phase diagrams illustrate the state of a substance (solid, liquid, gas) at various temperatures and pressures. The triple point on a phase diagram is where the three phases of matter coexist in equilibrium. It’s a unique condition where freezing (solidification) and boiling (vaporization) can happen simultaneously.
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