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8. Which condition is not a condition for an equilibrium system? A. equal rates for opposing changes B. a closed system C. reactants in the same phase D. constant temperature Knowledge/Understanding: 8 marks 9. What is the Brønstead-Lowry definition of a base? A. a substance that donates protons B. a substance that accepts protons C. a substance that dissolves in water to form OH ions D. a substance that dissolves in water to form H' ions A. HO 10. What is the conjugate acid of H/PO. (e? B. OH C. H:PO D. HPO? E. POd 11. What is the conjugate base of HSOM? A. HOY B. OH C. H-SO D. SO? E. This compound does not have a conjugate base. 12. What is the concentration of hydroxide ions in a solution of 0.350 mol/L Hiwe? A. 0.350 mol/L B. 0.175 mol/L C. 2.86 x 10-moll D. 0.650 mol/L E. 130 mol/L

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ALSO [4]: How would you identify these ions in aqueous solution by selective precipitation?

 

 

 

 

Question 11                                                     0/1 pts

At 427°C, a 5.0 L flask contains 20.0 moles of HCI, 18.0 moles of , 12.0 mol of , and 5.9 moles of water vapor at equilibrium. Calculate the for the reaction:

0.1967

You can get the concentrations (in M) for each substance by dividing the moles of an individual substance by the vessel volume.

During moderate activity, an endurance athlete mobilizes 40 grams of liver glycogen as free glucose in a two-hour period. Assume the entirety of this liberated glucose was used in the production of ATP via aerobic metabolism, yielding 32 ATP per glucose. Given the molar mass of glucose is 180g/mol, how many moles. To the nearest tenth of a mole, of ATP were synthesized from this mobilized liver glycogen? Please show your work and step by step

Calculate the Q-values for the electron-capture, beta+, and beta- decays of 64Cu.

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Treatment of a terminal alkene with ozone, followed by dimethyl sulfide (DMS), produces two carboxylic acids.

◯ True 

◯ False

If 20% of a compound is magnesium sulfate and the rest is aluminum hydroxide, the ratio of aluminum
hydroxide to magnesium sulfate is:
a. 3 : 1
b. 1 : 3
c. 0.25 : 1
d. 4 : 1

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13. A solution contains 3.25 x hydroxide ions. What is the pH of the solution?

A. 3.25

B. 6,51

C. 7.49

D. 8,00

E. none of the above

14. Identify the weakest acid,

A. HCN                  = 62 x  

B. HCOOH              = 1.8 x  

C.              = 72 x

D. HF                    = 66 x

E. All acids are the same strength, as long as they have a dissociable hydrogen ion.

15. The equilibrium system shown below was analyzed and the concentrations of    and were found, in mol/L, to be 4.4, 3.2, 1.5 respectively. The equilibrium constant must be which of the following? 

A. 4.0

B. 0.25

C. 0.92

D. 1.1

E. 0.16

16. The equilibrium shown below was analyzed and the concentrations of  , and were found in mol/L, to be 4.5, 2.6 and 12. The equilibrium constant must be which of the following? 

A. 1.4

B. 0.69

C. 9.8

D. 0.84

E. 1.2, 

17. A full syringe contains this equilibrium 

If nitrogen dioxide gas is brown and the other gas is colourless, what is observed when the syringe is used to compress this gas mixture?

A. the mixture gets darker

B. the mixture gets lighter

C. no change in colour of the mixture

D. the mixture is colourless

18. Consider this equilibrium

If some nitrogen gas were injected into this system at constant temperature and pressure the system would most likely experience which of the following?

A. an increase in (hydrogen)

B. a decrease in (ammonial)

C. a decrease in (hydrogen)

D. an increase in (ammonia)

E. both c and d

19. Consider the following system at equilibrium

    Which of the following actions would cause the   to increase? 

A. I and II

B. III and VI 

C. IV and V

D. III

E. VI

If 2.31 kg of a drug is used to make 2,000 tablets, how many milligrams of drug will 40 tablets contain?
a. 0.0462 mg
b. 462.00 mg
c. 46200 mg
d. 46.2 mg

Degrees of Unsaturation (show work)

2) Complete the spectroscopy data tables for a compound with molecular formula . Determine the structure of the compound. Any labile protons, if they exist, will not be present in the 'H NMR spectrum. Look carefully at the integration values!