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Chemistry Test
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Chemistry Test
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25 Questions

1. H2(g) + O(g) ↔ H2O(g) In this reversible exothermic reaction - which factor will shift the equilibrium to the reactants?
2. Exists as a liquid at STP.
3. Forms a compound having the formula XH3 (where X is an element).
4. PCl5(g) ↔ PCl3(g) + Cl2(g) In this reversible endothermic reaction - which factor will result in more product formation?
5. Forms ions with +1 charge in solution.
6. Which atom has sp hybridization?
7. Water is placed in a freezer. What is the effect on its energy content and entropy content?(E)nergy Entropy
8. How many atoms are in 9g of H2O?
9. What is the geometry of PF5?
10. Colligative properties of solutions apply to which of the following?
11. What reaction takes place at the anode?
12. Which one of the following solutions would have the lowest freezing point?
13. The spontaneous exothermic reaction - PCl5(l) +(C)l2(g) ➞ PCl5(s) - has what signs for Δ G - Δ H - and ΔS? ΔG ΔH ΔS
14. Which of the following are allotropes?
15. If there are 12.04 × 1023 atoms of H2(g) - how many liters of H2 are there at STP?
16. An atom has an atomic number of 15 and an atomic mass of 31. Which of the following is false?
17. What type of reaction is Pb(NO3)2 (aq) + 2NaI (aq) âžž ?
18. Exists as a liquid in its elemental form.
19. This reaction produces an acidic solution.
20. Which of the following is most likely to be found in nature in gaseous form?
21. What type of reaction is HCl (aq) + NaOH (aq) âžž ?
22. What type of reaction is CH3CH2OH + O2 âžž ?
23. According to the rate law of the reaction - doubling the concentration of reactant A has what effect on the reaction at 25oC?
24. For the molecules above - the resultant dipole moments are oriented (from left to right):
25. 1s22s22p63s23p5(A)toms of element X have the electronic configuration shown above. The compound most likely formed with calcium - Ca - is