Archive for the ‘CH141 General’ Category
The Final Exam
The CH141 exam will be on Monday, 12/17 at 1:30 -4:30 PM. We will use the same Keyes first floor classrooms for the exam. You may work for the entire 3 hours, but the exam is expected to take most students 120 min. The exam will cover all class and laboratory materials and we will use the same format as the hour exams. Allowed exam items are pens/pencils and a course-approved calculator. You will be provided with a periodic table and equation sheet. You may bring snacks and a water bottle.
There will be an optional review session on Sunday, 12/16 in Keyes 105 at 4 PM.
There will also be office hours from 1-2pm Monday, 12/10 through Friday, 12/14. On Monday and Tuesday Prof. Madison will be in the Chem Help Center (Keyes 104). On Wednesday through Friday, come to her office (Keyes 314).
Practice exams are posted on our web page. The Final Exam Equation Sheet is available as well.
Making White Light – materials research for a better world
“Incandescent bulbs are one of the most energy-inefficient products in daily use,” Joanna McKittrick says. Touch a regular old 100-W light bulb after it’s been lit for a few minutes, and you’ll see what she means.
Less than 5% of the electrical energy that goes into the tungsten filament inside is converted to visible light, explains McKittrick, a luminescent materials specialist at the University of California, San Diego. The rest is wasted as heat that, should you follow our instructions, will burn your fingers.
Incandescents “basically haven’t changed since Thomas Edison invented them” about 140 years ago, she says.
Discovered via computational screening for new phosphors, this compound (above) is the first member of the previously unknown Sr-Li-Al-O crystal family. Black outline = unit cell. Gold = Sr. Red = Li. Green = Al. Blue = O.
Bulbs that contain light-emitting diodes (LEDs), on the other hand, can produce the same amount of white light but barely feel warm to the touch. That’s because LEDs are more energy efficient. A 15-to-20-W LED can produce the same brightness as a 100-W incandescent, roughly 1,500 lumens. LEDs are also less fragile and can last tens of thousands of hours longer. Nevertheless, these modern alternatives currently account for less than 10% of lighting worldwide, according to data from the U.S. Department of Energy.
more … https://cen.acs.org/materials/inorganic-chemistry/chemical-search-better-white-light/96/i46
Third Exam and Review Session
Reminder: Exam 3 is Wednesday, Nov. 28. Exam Locations: Keyes 105, 102, 103, and 114.
Practice exams and their solutions can be found on the Sample Exam page. The relevant files are Practice Exam 3, Exam 3 (with answers) from 2016, and Practice Exam 3 2017. You are strongly encouraged to do these practice exams before Monday 11/26.
Exam information: Exam 3 will be held on Wed, Nov. 28 from 5:00-7:00 pm. You may work for the entire 2 hours, but the exam is expected to take most students 60 min. The exam will cover the class material from chapters 1-10 and laboratory material from up to and including experiment 9. Chapters 6-9 will be emphasized (Electronic Structure of Atoms through Molecular Geometries and Bonding Theories). Allowed exam items are pens/pencils and a course-approved calculator. You will be provided with a periodic table and equation sheet.
There will be an optional review session on Monday, 11/26 in Keyes 105 at 7 PM.
Second Exam and Review Session
Review session for the second exam is on Tuesday at 8 PM in Keyes 105.
Reminder: Exam 2 is Thursday, Oct. 25! Exam Locations: Keyes 105, 102, 103, and 114.
A practice exam can be found on the “Sample Exams” section of the course website.
Exam information: Exam 2 will be held on Thursday, Oct. 25 from 5:00-7:00 pm. You may work for the entire 2 hours, but the exam is expected to take most students 60 min. The exam will cover the class material from chapters 1-5, 10, 20.1, and 20.2 and laboratory material from experiments 1-6. Read experiment 6 even if you have Friday lab. It is a excellent review of thermochemistry. Allowed exam items are pens/pencils and a course-approved calculator. You will be provided with a periodic table. There will be an optional review session on Tuesday, 10/23 in Keyes 105 at 8 PM.
Equation Sheet for Exam #2: Exam 2 Equations and Constants
Exam and Review Session
Review session for first exam is on Sunday at 7 PM in Keyes 5.
Reminder: Exam 1 is Monday, Oct. 1st! Exam Locations: Last name A-M in Keyes 105. Last name N-Z in rooms 102 and 103, and 114.
A practice exam can be found on the “Sample Exams” section of the course website. The relevant files are Practice Exam 1, Answers to Practice Exam 1 , and Exam 1 from 2016.
Exam information: Exam 1 will be held on Monday, October 1st from 5:00-7:00 pm. You may work for the entire 2 hours, but the exam is expected to take most students 60 min. The exam will cover the class material from chapters 1-3, chapter 4 sections 1-2 and 5-6 (note: titrations from section 6 will not be tested), and laboratory material from experiments 1-3. Allowed exam items are pens/pencils and a course-approved calculator. You will be provided with a periodic table. There will be an optional review session on Sunday, September 30 starting at 7:00 pm in Keyes 105.
Can mRNA disrupt the drug industry?
Used by all living things to make proteins, messenger RNA is one of the least explored frontiers of drug discovery. Moderna Therapeutics, and an increasing number of similarly well-funded biotech firms, is built on the promise that mRNA can be turned into a powerful treatment for genetic diseases, cancer, infectious diseases, and more. But turning mRNA into a drug is far from trivial, and companies have kept their technology largely under wraps. Now, Moderna is offering a glimpse of its massive research engine. Read on to learn how researchers are trying to move mRNA out of the lab and into the clinic. – Read more.
Reference: Chemical & Engineering News, SEPTEMBER 3, 2018 | APPEARED IN VOLUME 96, ISSUE 35
Resources: This video was also posted by the American Chemical Society…
Eric Roy – A Colby Environmental Rockstar!
Read More about Hydroviv, a water treatment company making a difference for the people of Flint and consumers across the USA (https://www.hydroviv.com/blogs/water-smarts/)
CH141 General Resources
Mastering Chemistry Homework Website. (CH1412018)
Instructions Get Started withMastering Chemistry 2018
Mastering Chemistry Support Page.
Innovation requires the application of chemical basics to produce new technologies: Corning Gorilla Glass, Tesla Powerwall. We are interested in producing the next generation of innovators.
https://youtu.be/r-3cUC-JKb8?list=PL_Vcr66Y-sC_1peoFLL3XBZs9kUoEKZLy