Voltaic cells - Study guides, Class notes & Summaries

CHEM 210 TEST QUESTIONS 100% SOLUTIONS Which one of the following is not a redox reaction? - ANSWER Al(OH)4-(aq) + 4H+(aq) ® Al3+(aq) + 4H2O(l) Consider the reaction CuO(s) + H2(g) ® Cu(s) + H2O(l) In this reaction, which substances are the oxidant (oxidizing agent) and reductant (reducing agent), respectively? - ANSWER CuO and H2 When the following redox equation is balanced with smallest whole number coefficients, the coefficient for nitrogen dioxide will be _____. I2(s) + HN...

Which of A-D is a disadvantage in using hydrogen fuel cells instead of gasoline engines in vehicles? If all are valid disadvantages, respond E. a. No distribution network of hydrogen fuel is in place b. It is difficult to store hydrogen safely c. Hydrogen fuel is not really a source of energy, but rather is a way to store energy d. Hydrogen fuel must be produced, most likely from water, by using another source of energy e. All of the above E The numerical Value of the faraday cons...

Chapter 1 description & Electronics Technician Exam 89 Questions with Verified Answers Electricity - CORRECT ANSWER Energy due to electric charges at rest or in motion that can be transmitted to produce effects such as heat, light, motion or sound. Electric Charge - CORRECT ANSWER An electrical property of matter that creates electric and magnetic forces and interactions. Positive (+) - CORRECT ANSWER An electric field lacking electrons. Negative (-) - CORRECT ANSWER An electric fiel...

Electricity for the Trades, 3e (Petruzella) Chapter 3 Sources and Characteristics of Electricity 1) One of the simplest ways to produce static electricity is by friction. Answer: TRUE Difficulty: 1 Easy Learning Objective: Explain how static positive and negative charges are produced. Bloom's: Understand Accessibility: Keyboard Navigation 2) An electrostatic field is represented graphically by magnetic lines of force. Answer: FALSE Difficulty: 1 Easy Learning Objective: Explain how st...

Word History: We didn't have this word for a person who studies the natural & physical world until William Whewell invented it in 1834? Scientist Word History: Lewis Carroll coined this word, perhaps as a portmanteau of "chuckle" & "snort"? Chortle Brainpower TV Catchphrase: Mork:This double-talk Orkan signoff? Nanu Nanu Party: Combining a holiday & a month, it's the title of a Preston Sturges film, or a party theme illustrated here? Christmas in July Brest: Brest is in this regio...

Oxidize - correct answer When a substance LOSES its electrons. Reduced - correct answer When a substance GAINS its electrons. Redox Reaction - correct answer The net reaction of oxidation and reduction. Oxidation and Reduction - correct answer Occur together in ONE reaction. Oxidizing Agent - correct answer A substance that gets reduced causes another substance to be oxidized. Reducing Agent - correct answer A substance that gets oxidized cause anothe...

CHEM 102 Winter 18 Final Exam (A) Questions and Answers Potentially useful data: x  1 atm = 760 torr = 760 mm Hg 2 a [A]t = – kt + [A]o ΔG° = ΔH° – T ΔS° ln[A]t = – kt + ln[A]o ΔG = ΔG° + RT ln Q 1/[A]t = kt +1/[A]o ΔG° = – RT ln K First order half-life: t1/2 = ln2 / k ΔG° = – nFE° pH  pKa  log base acid  E  E  R T ln Q n F R = 8.314 J mol-1 K-1 F = 96500 C/mol e- 1. Please choose the letter “A” as your a...

CHEM 102 Winter 18 Final Exam (A) Questions and Answers Potentially useful data: x  1 atm = 760 torr = 760 mm Hg 2 a [A]t = – kt + [A]o ΔG° = ΔH° – T ΔS° ln[A]t = – kt + ln[A]o ΔG = ΔG° + RT ln Q 1/[A]t = kt +1/[A]o ΔG° = – RT ln K First order half-life: t1/2 = ln2 / k ΔG° = – nFE° pH  pKa  log base acid  E  E  R T ln Q n F R = 8.314 J mol-1 K-1 F = 96500 C/mol e- 1. Please choose the letter “A” as your a...

Double-displacement reaction - answer-is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. Precipitate - answer-is an insoluble solid that emerges from a liquid solution. The emergence of the insoluble solid from solution is called precipitation. Often the precipitate emerges as a suspension. (precipitates can form when two soluble salts react in solution to form one or more insoluble products) Energy levels - answer-(also ...

[Includes Diagrams] A high-quality summary of the all the electrochemistry, organic and inorganic Chemistry you'll need to know for Physical Sciences in your Matric year. Including summarised Grade 10 and 11 concepts relating to the section's topics. High definition, digital notes colour-coded by section. Detailed breakdown of the contents: Homologous series, IUPAC naming, Isomers, organic reactions, acids and bases, ionisation, hydrolysis of salts, half-cells, galvanic/voltaic ce...