1. Mid-Term Test Review 2015… Semester 2 These are typical questions that would be good examples for the test …

2. Gas Laws Unit Which of the following are the highest pressure? Show work… 124 kPa 900 mm Hg 1.18 atmospheres

3. Gas Laws Unit 3.5 moles of gas occupy a volume of 20 L at 400 kPa. What is the temperature of the gas in degrees Celsius?

4. Gas Laws Unit A container of helium is sealed at 22.0 °C and 1.40 atmosphere of pressure. What pressure would be exerted by the helium if the container were heated to 220.0 °C? (and container remained sealed)

5. Gas Laws Unit A gas balloon has a volume of 106.0 liters when the temperature is 45.0 °C and the pressure is 740.0 mm of mercury. What will its volume be at 20.0 °C and 780.0 mm of mercury pressure?

6. Gas Laws Unit Explain a simple way to prove or show that gases have mass.

7. Calculate the percent composition of H 2 SO 4 for each of the elements

8. Are the following molecular or empirical formulas? If it is a molecular formula write the empirical formula. A) Na 2 S 2 O 4 B) Fe 4 O 6 C) C 3 H 8

9. Determine the empirical formula for the following compounds based on their percent composition. Show your work and circle your answer. 60.9% As and 39.1% S

10. Determine the energy for a Photon of Light whose Frequency is 2.5 x 10 15 hertz. Put answer in correct unit.

11. Classify the following reaction and write a complete balanced equation. Butane vapors (C 4 H 10 ) suddenly explode after a spark ignites them

12. Write the balanced chem eq… Aluminum bromide reacts with chlorine gas to yield aluminum chloride and bromine gas.

13. Write the balanced chem eq… Hydrochloric acid plus sodium hydroxide yield sodium chloride plus water.

14. What is the wavelength (in centimeters) of a light wave that has a frequency of 7.05 x 10 16 Hz Show the formula used for this calculation.

15. Some colored light is passed through a prism and the following is observed. What would this be called, AND… WHY are the different lines seen here present? (explain as completely as you can. A diagram may be helpful)

16. The electron configuration for Nitrogen is 1s 2 2s 2 2p 3. What does the 2p 3 mean? Be specific…

17. What ground state element is this? 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6

18. Explain (define) what electronegativity is AND show the trends both across the PT and up/down in families.

19. Draw a simple outline of the periodic table and… Show the trend for how ionization energy is periodic AND Explain what ionization energy is a measurement of...

20. What is the trend for the atomic radii (atomic size) on the periodic table... – Across periods (horizontally) – Vertically (in families/groups) AND explain WHY for both…

21. Write the Noble gas (short hand) electron configuration for the following element… Calcium and Gold

22. How many valence electrons are in the following elements: – Calcium – Sulfur – Iodine

23. If Iodine has 7 valence electrons, what specific electron orbital or orbitals are those valence electrons found within and how many in each orbital

24. If the titanium ion has a charge of +2, where did the 2 electrons get lost (or taken) from to form the Ti +2 ion?

25. Classify the following reaction and write a complete balanced equation. aluminum chloride reacts with potassium hydroxide

26. Classify the following reaction and write a complete balanced equation. sodium reacts with oxygen gas

27. Classify the following reaction and write a complete balanced equation. Zinc metal reacts with silver (I) nitrate solution – Zinc always forms a +2 ion.