Explain how a fuel-cell breathalyzer works.

A redox reaction has an equilibrium constant of K = 0.055. What is true of $\Delta G_{\mathrm{rxn}}^{\mathrm{o}}$ and $E_{\mathrm{cell}}^{\circ}$ for this reaction?

What is a concentration electrochemical cell?

List four forms of energy that might be absorbed or released during a chemical reaction.

Two biology instructors set out to evaluate the effects of discovery-based teaching compared to the standard lecture-based teaching approach in the laboratory. The standard lecture-based approach provided a list of instructions to follow at each step of the laboratory exercise, whereas the discovery-based approach asked questions rather than providing directions, and used small group reports to decide the best way to proceed in reaching the laboratory objective. One evaluation of the techniques involved written appraisals of both techniques by students at the end of the course. The comparison of the number of positive and negative responses for both techniques is given in the following table.

Group, Positive Evaluations, Negative Evaluations, Total Discovery, 37, 11, 48 Control, 31, 17, 48

a. Is there a significant difference in the proportion of positive responses for each of the teaching methods? Use $\alpha$=.05. If so, how would you describe this difference? b. What is the approximate p-value for the test in part a?

For the phrase in the first column, write the letter of the synonymous phrase in the second column.

$$\begin{matrix} \text{direct balefully} & \text{a. spoil the toil}\\ & \text{b. naturally matchable}\\ & \text{c. an iniquity from antiquity }\\ & \text{d. born to adorn}\\ & \text{e. usin' a euphemism}\\ & \text{f. sickening chicken}\\ & \text{g. intense defense}\\ & \text{h. administer sinisterly}\\ & \text{i. a diabolical frolic}\\ & \text{j. an inexorable force}\\ \end{matrix}$$

Briefly explain its connection to East Asia between 600 and 1350. 6.Shinto

After all foreign and U.S. taxes, a U.S. corporation expects to receive 2 pounds of dividends per share from a British subsidiary this year. The exchange rate at the end of the year is expected to be $1.53 per pound, and the pound is expected to depreciate 5% against the dollar each year for an indefinite period. The dividend (in pounds) is expected to grow at 10% a year indefinitely. The parent U.S. corporation owns 10 million shares of the subsidiary. What is the present value in dollars of its equity ownership of the subsidiary? Assume a cost of equity capital of 11% for the subsidiary.

An analyst is evaluating securities in a developing nation where the inflation rate is very high. As a result, the analyst has been warned not to ignore the cross-product between the real rate and inflation. A 6-year security with no maturity, default, or liquidity risk has a yield of 20.84%. If the real risk-free rate is 6%, what average rate of inflation is expected in this country over the next 6 years?

Three nested hollow spheres have the same center. The innermost sphere has a radius of 2 cm and carries a uniformly distributed charge of $6 \mathrm{nC}\left(1 \mathrm{nC}=1 \times 10^{-9} \mathrm{C}\right).$ The middle sphere has a radius of 5 cm and carries a uniformly distributed charge of -4 nC. The outermost sphere has a radius of 10 cm and carries a uniformly distributed charge of 8 nC. What is the magnitude of the electric field at a distance of 1 cm from the center?

Analyze the Functions of the Executive Branch of Government Analyze the functions of the executive branch of government , including the growth of presidential power, and create a written , oral, or visual product on a contemporary government issue or topic using critical methods of inquiry. Using valid primary and secondary sources , create a presentation focusing on the issue of the growth of presidential power and analyzing the function of the executive branch. Consider the following questions: What is the executive branch of government ? What are the powers of the executive branch of government as outlined in the U.S. Constitution ? How have the powers of the President grown since the founding of the United States? Why have presidential powers grown?

What was the relationship between the Nationalists and the Communists?

Write the arguments in symbols and then test its validity. Isaac will pass the Mathematics test or drop out of the IB diploma. He does not drop out of the IB diploma. Therefore he passed the Mathematics test.

What is a fuel cell? What is the most common type of fuel cell, and what reactions occur at its anode and cathode?