Blog

When Technetium-95 decays by positron emission, the product nucleus formed is…

Consider the chemical equilibrium in a reaction vessel:             N2(g)   +   3 H2(g)  

Extra Credit Section 1 What is the van’t Hoff factor, i, for the salt (NH4)2SO3?

A buffer consists of 1.00 M HC7H5O2 (Ka=6.46×10-5) and 1.50 M NaC7H5O2.  What is the pH of this buffer?  Give pH to two decimal places.

The molar solubility of silver phosphate, Ag3PO4, is 4.26×10-5.  Determine the Ksp of silver phosphate.  Give your answer to two significant digits.   Ksp=[number]x10^[exponent]

Consider the following chemical reactions:   2 K(s) +  F2(g)  

Consider the chemical equilibrium in a reaction vessel:             2 NH3(g)  

Consider the following Voltaic Cell, Select the correct answer from the drop box for each question. Which electrode will act as the anode? [answer1] Which way do electrons travel through the external wire connecting the electrodes? [answer2] As the battery runs, what will happen to the concentration of Ag+ as time increases? [answer3] Which electrode would gain mass as the battery runs? [answer4] Which direction would anions travel through the solution? [answer5]      

Section 3 Extra-credit A particular reaction has

The picture below shows the tradeoff between economic output and the environment with a production possibility frontier:  Based on the picture above, complete the sentences correctly.  At point A, a country would be selecting a [option1] level of economic output but [option2] level of environmental protection. At the other extreme, at point F, a country would be selecting a [option3] level of environmental protection but [option4] level of economic output. According to the graph, an increase in environmental protection involves an opportunity cost of [option5] economic output. No matter what their preferences, all societies should wish to avoid choices like [option6], which are productively inefficient. For instance, point D shows that this society could increase environmental protection without sacrificing economic output by moving to [option7], or increase economic output without sacrificing environmental protection by moving to [option8].  Efficiency requires that the choice lie on the production possibility frontier. This means that the only way to increase environmental protection is by [option9] economic output and vice-versa. Increasing environmental protection without reducing economic output or vice-versa is a sign of productive [option10].