q3/ one of the most common causes of inaccurate melting points is too rapid heating of...
q3/ one of the most common causes of inaccurate melting points is too rapid heating of the melting point bath . Under these circumstances how will the observed melting point copare to the true melting point ?
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q3/ one of the most common causes of inaccurate melting points
is too rapid heating of...
Powder (shor sten FUNNELS Fitering (long stem 63 Chapter 4 Melting Points, Boiling Points, and Refractive Indices Q...
Powder (shor sten FUNNELS Fitering (long stem 63 Chapter 4 Melting Points, Boiling Points, and Refractive Indices Questions 1. What effect would poor circulation of the melting point bath liquid have on the observed melting point? 2. What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound? 3. Three test tubes, labeled A, B, and C, contain substances with approxi- mately the same melting points. How could you prove the...
8. One of the most common causes of foodborne illness is a. improper holding temperatures b. too much exposure to a...
8. One of the most common causes of foodborne illness is a. improper holding temperatures b. too much exposure to air c. high-acid foods d. low-acid foods 9. The most likely source of botulism is a. highly processed foods b. home canned foods c. unrefrigerated foods d. fresh foods 10.Salmonella bacteria are found most commonly in a. meat, eggs, rice b. eggs, chicken, milk products c. pork, chicken, cheese d. fish, cheese fruit 11.E coli is found most often in...
Pick one of the most common causes of death in regard to an autoimmune or infectious...
Pick one of the most common causes of death in regard to an autoimmune or infectious disease. Explain how the cause you have chosen ultimately leads to death. Are there any emerging treatments for this disease?
Pick one of the most common causes of death in regard to an autoimmune or infectious...
Pick one of the most common causes of death in regard to an autoimmune or infectious disease. Explain how the cause you have chosen ultimately leads to death. Are there any emerging treatments for this disease?
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
QUESTION 1 Vasovagal syncope is one of the most common causes of fainting and occurs in...
QUESTION 1 Vasovagal syncope is one of the most common causes of fainting and occurs in some individuals when they see blood or a needle. Which of the following physiological responses occurs? reduced cerebral blood flow decreased blood pressure decreased heart rate All the alternatives 2 points QUESTION 2 Calculate mean arterial pressure (MAP) if a person has a blood pressure reading of 107/72. 96 mm Hg 76 mm Hg 119 mm Hg 84 mm Hg 2 points ...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
1 points (Extra Credit) Bonus question: One of the most common laboratory accidents is fainting Envision...
1 points (Extra Credit) Bonus question: One of the most common laboratory accidents is fainting Envision this scenario, which has happened at CSUB. A student standing beside you at the lab bench suddenly sways and then topples towards you. You catch the student in your arms to avoid being smashed by the fall Now what should you do? Place the answers in the correct order. Gently lower the student to the floor Inform the First Aid responder of all circumstances...
Problem 6 (16 points): One of the most common types of rechargeable batteries is known as...
Problem 6 (16 points): One of the most common types of rechargeable batteries is known as the nickel metal hydride battery, which has the overall reaction NiOOH(aq) + MH(s) - Ni(OH)2(aq) + M(S) E° = 1.35 V where M is a generic transition metal. a. (4 points) Identify the oxidizing agent and the reducing agent in this reaction. b. (4 points) How many electrons are transferred during this reaction? Show your work. c. (8 points) Such batteries need to be...
Powder (shor sten FUNNELS Fitering (long stem 63 Chapter 4 Melting Points, Boiling Points, and Refractive Indices Questions 1. What effect would poor circulation of the melting point bath liquid have on the observed melting point? 2. What is the effect of an insoluble impurity, such as sodium sulfate, on the observed melting point of a compound? 3. Three test tubes, labeled A, B, and C, contain substances with approxi- mately the same melting points. How could you prove the...
8. One of the most common causes of foodborne illness is a. improper holding temperatures b. too much exposure to air c. high-acid foods d. low-acid foods 9. The most likely source of botulism is a. highly processed foods b. home canned foods c. unrefrigerated foods d. fresh foods 10.Salmonella bacteria are found most commonly in a. meat, eggs, rice b. eggs, chicken, milk products c. pork, chicken, cheese d. fish, cheese fruit 11.E coli is found most often in...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 1 5 pts - What is the purpose of melting point? All the answers To check the purity of solids To check identity of unkown solids To publish for new solids for future characterization Question 2 5 pts How does impurity change melting point value and range? increase-narrowing decrease-narrowing decrease-broadening O increase-broadening Question 3 5 pts What is the reason of an impurity affecting melting point of a solid? Watch Mel. Point Theory video. Not known Obc it weakens...
Question 14 The melting point of a pure compound is known to be 110-111º. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity. 90-96 111-113 90-91 110-111 5 pts Question 15 You and your lab partner take melting points of the same sample. You observe a melting point of 101-107°C, while your partner observes a value of 110-112°C. Explain how you can get two different values with exactly the same sample. One of the...
1 points (Extra Credit) Bonus question: One of the most common laboratory accidents is fainting Envision this scenario, which has happened at CSUB. A student standing beside you at the lab bench suddenly sways and then topples towards you. You catch the student in your arms to avoid being smashed by the fall Now what should you do? Place the answers in the correct order. Gently lower the student to the floor Inform the First Aid responder of all circumstances...
Problem 6 (16 points): One of the most common types of rechargeable batteries is known as the nickel metal hydride battery, which has the overall reaction NiOOH(aq) + MH(s) - Ni(OH)2(aq) + M(S) E° = 1.35 V where M is a generic transition metal. a. (4 points) Identify the oxidizing agent and the reducing agent in this reaction. b. (4 points) How many electrons are transferred during this reaction? Show your work. c. (8 points) Such batteries need to be...
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