1. Science Starters
1/18/2019
Why do Everest climbers often use oxygen?

2. Science Starters
1/18/2019
Use Boyle's law to describe what would happen to a SCUBA diver if s/he held her/his breath while ascending. Use the words pressure and volume in your explanation.

3. Science Starters
1/18/2019
Calculate the volume of 1.00 mol of hydrogen gas at zero C and 1.00 atm.

4. Science Starters
1/18/2019
Would you expect one mole of gas in this classroom to occupy more or less volume than 22.4 L? Justify your answer.

5. Science Starters
1/18/2019
How many times faster will ammonia (NH3) effuse compared to hydrogen chloride gas (HCl)?

6. Science Starters
1/18/2019
38) What would a temperature v. time graph look like if you heated frozen H2O ice (starting at -10 C) to superheated steam (at 110 C)?
temperature (C)
time

7. Science Starters
1/18/2019
40) If you wanted to make 150. mL of 2.00 M NaOH (aq), how much solid NaOH would you need to measure out?

8. Science Starters
1/18/2019
40) What would you expect the freezing point of a solution to be if you created it by adding 12.0 g of NaCl to mL of water?

9. Science Starters
41) What is the difference between TEMPERATURE and HEAT?
1/18/2019

10. Science Starters
1/18/2019
40) How much heat is absorbed by 320 mL of water when its temperature is raised from 20 C to 55 C?

11. Science Starters
1/18/2019
41) If 100. mL of water in a calorimeter increases 10.0 C when Mg reacts with HCl, then what is the heat of reaction (qrxn)?

12. Science Starters
1/18/2019
42) Calculate the H for: 2Al + Fe2O3 2Fe + Al2O3 Given that, 2Al + (3/2)O2  Al2O3 H = kJ 2Fe + (3/2)O2 Fe2O3 H = -824 kJ

13. Science Starters
1/18/2019
43) Find H for the reaction below: H2(g) + ½ O2(g)  H2O(l)

14. Science Starters
1/18/2019
44) What is the accepted value for the heat of fusion of ice (water)?

15. Science Starters
1/18/2019
46) What must be the sign of H and S if a reaction is said to be spontaneous at any temperature?

16. Science Starters
1/18/2019
47) Define equilibrium.

17. Science Starters
1/18/2019
48)Calculate the keq for the synthesis of ammonia if the following concentrations are present at equilibrium:
N2(g) + 3H2(g) <-> 2NH3(g)
[N2] = 3.1 mol/L;
[H2] = 5.7mol/L;
[NH3] = 6.2 mol/L

18. Science Starters
1/18/2019
49) What would you do to shift the following equilibrium position as far to the right as possible: N2(g) + 3H2(g) <-> 2NH3(g) + heat

19. Science Starters
1/18/2019
50) What are some differences between acids and bases?

20. Science Starters
1/18/2019
51) What is the difference between a concentrated acids and a strong acid (or base)?

21. Science Starters
1/18/2019
52) What is the pH of a solution with an OH- concentration of 3.4 x 10-6 M?

22. Science Starters
1/18/2019
53) How much 18.0 M HCl would be required to neutralize 50.0 mL of 9.0 M NaOH?

23. Science Starters
1/18/2019
54) If you combined 50 mL of acid (pH=3) with 50 mL of base (pH = 8), would the resulting solution be an acid, base or neutral substance.

24. Science Starters 3Sn2+ + IO3- + 6H+  3Sn4+ + I- + 3H2O
1/18/2019
55) Determine the oxidation states of each species below and name the oxidizing and reducing agents.
3Sn2+ + IO3- + 6H+  3Sn4+ + I- + 3H2O

25. Science Starters
1/18/2019
56) Balance the equation below and write the balanced half reactions: Mg + Zn(NO3)2  Zn + Mg(NO3)2

26. Science Starters
1/18/2019
57) What are some of the differences between chemical and nuclear reactions?

27. Science Starters
1/18/2019
58) When two carbon-12 nuclides inside a star fuse together, they release a proton and a heavier nuclide. Write the nuclear equation for this reaction.

28. Science Starters
1/18/2019
59) Define half-life. What is the half-life of Carbon-14?

29. Science Starters
1/18/2019
60) A dinosaur bone is found in the Grand Canyon. A colleague of yours suggests that you measure C-14 in the sample to determine its age. What is your response and why?

30. Science Starters
1/18/2019
61) Define organic chemistry.

31. Science Starters Draw the structure for 1,3,5-trimethylbenzene
1/18/2019
Draw the structure for
1,3,5-trimethylbenzene