Wednesday, December 17, 2014
Tuesday, December 16, 2014
12/16 Chemistry Class and homework due 1/6
Hi folks,
Today we took a look at different types of chemical bonds and how to use that information to name molecules.
For homework,
Read chapter 6 in the text. It starts on page 176.
Also, do the enclosed .pdf. I've included the answer sheet so that you can see if you are on the right track or not.
Today we took a look at different types of chemical bonds and how to use that information to name molecules.
For homework,
Read chapter 6 in the text. It starts on page 176.
Also, do the enclosed .pdf. I've included the answer sheet so that you can see if you are on the right track or not.
Wednesday, December 10, 2014
12/9 Chemistry update and homework due 12/16
Hi folks,
Today we dove a bit deeper into the periodic table and began looking at valence electrons and how they effect the way elements combine with other elements.
Homework for this week is to:
Read Pages 133 - 146 in the text book
Do Review Questions on page 166 and 167 #'s 1- 21. Just do the odd #'s
Create stable molecules using the following atoms.
1. H with Cl
2. Mg and F
3. K with Br
4. Na with Cl
5. H with C
6. C with Cl
7. O and O
8. C and O
9. N and N
10. H and C and N
11. H and C and O
Today we dove a bit deeper into the periodic table and began looking at valence electrons and how they effect the way elements combine with other elements.
Homework for this week is to:
Read Pages 133 - 146 in the text book
Do Review Questions on page 166 and 167 #'s 1- 21. Just do the odd #'s
Create stable molecules using the following atoms.
1. H with Cl
2. Mg and F
3. K with Br
4. Na with Cl
5. H with C
6. C with Cl
7. O and O
8. C and O
9. N and N
10. H and C and N
11. H and C and O
Tuesday, December 2, 2014
12/2 Chemistry update and homework due 12/9
Hi folks,
Today we took a very quick look the three forms of heat transfer, convection, conduction and radiation. These are how heat moves from one object to another. We also began our investigation into the periodic table and into diagraming atoms. Next week we will get much deeper into these concepts and more.
1. How many protons, neutrons and electrons are in the following atoms
a. Aluminum
b. Antimony
c. Strontium
d. Oxygen
e. A positive ion of Gallium
f. A negative ion of Barium
2. Remember, the atomic weight of an atom is its protons plus its neutrons. With that in mind how many protons and neutrons are in the following atoms. Which ones would be isotopes?
a. Arsenic atomic weight 75
b. Phosphorus atomic weight 27
c. Aluminum atomic weight 29
3. Create a Bohr diagram for the following atoms.
a. Lithium
b. Barium
c. Neon
d. Sodium
e. Argon
f. He
4. Draw the shape of the periodic table and label:
a. Non-metals
b. transition metals
c. halogens
d. Alkali metals
e. Alkali Earth metals
Memorize the following atomic symbols and what they stand for: (Index cards would be great for this!)
H, He, Li, C, N, O, Ne, Na, Mg, Al, Cl, Ar, K, Ca, Fe, Ni, Cu, Kr, Ag, Sn, Xe, Au, Hg, Pb, Rn, P
Today we took a very quick look the three forms of heat transfer, convection, conduction and radiation. These are how heat moves from one object to another. We also began our investigation into the periodic table and into diagraming atoms. Next week we will get much deeper into these concepts and more.
1. How many protons, neutrons and electrons are in the following atoms
a. Aluminum
b. Antimony
c. Strontium
d. Oxygen
e. A positive ion of Gallium
f. A negative ion of Barium
2. Remember, the atomic weight of an atom is its protons plus its neutrons. With that in mind how many protons and neutrons are in the following atoms. Which ones would be isotopes?
a. Arsenic atomic weight 75
b. Phosphorus atomic weight 27
c. Aluminum atomic weight 29
3. Create a Bohr diagram for the following atoms.
a. Lithium
b. Barium
c. Neon
d. Sodium
e. Argon
f. He
4. Draw the shape of the periodic table and label:
a. Non-metals
b. transition metals
c. halogens
d. Alkali metals
e. Alkali Earth metals
Memorize the following atomic symbols and what they stand for: (Index cards would be great for this!)
H, He, Li, C, N, O, Ne, Na, Mg, Al, Cl, Ar, K, Ca, Fe, Ni, Cu, Kr, Ag, Sn, Xe, Au, Hg, Pb, Rn, P
Tuesday, November 18, 2014
Recording for 11/18 Chem class - Atoms
Unfortunately, my SD card ran out of memory and it missed the last 20 minutes or so.
11/18 Chemistry update and homework due 12/2
Hi folks,
Just a reminder, no class next week due to Thanksgiving. May all your turkeys be chemically tasty!
Today we began our study on the periodic table and the elements. We took a brief but, hopefully, fascinating look at how bizarre the atom really is. Next week we'll get more into detail about the atom and the elements.
Homework due 12/2 is to:
Read the text from 89 - 92
Do Review questions pg 95 #'s 27 - 34
Do Exercise questions on pg. 98 #'s 28 - 31 and 33-34
Do Problems on pg 98 #'s 3 and 4
Just a reminder, no class next week due to Thanksgiving. May all your turkeys be chemically tasty!
Today we began our study on the periodic table and the elements. We took a brief but, hopefully, fascinating look at how bizarre the atom really is. Next week we'll get more into detail about the atom and the elements.
Homework due 12/2 is to:
Read the text from 89 - 92
Do Review questions pg 95 #'s 27 - 34
Do Exercise questions on pg. 98 #'s 28 - 31 and 33-34
Do Problems on pg 98 #'s 3 and 4
Wednesday, November 12, 2014
Tuesday, November 11, 2014
11/11 Chemistry update and homework due 11/18
Hi folks,
Today we took the time to review and wrap up (almost) the heat vs. temperature unit we've been working on for the past several weeks. It is a very confusing unit, probably the most difficult of the year, and so we took a bit more time to make sure everyone has some grasp of the concepts.
Here are a few websites for the concepts we've been covering the last two weeks. They do a nice job giving examples of the problems and solutions. After taking a look at these, I hope you all feel much more comfortable with these types of problems. As always, DON'T HESITATE, to contact me if you have any questions.
http://www.chemteam.info/Thermochem/Time-Temperature-Graph.html Go through the steps and try to answer the problems. Write down your answers, then feel free to look at the answers.
Monday, November 10, 2014
Change in answer for 1c
Hi folks,
The answer for 1c is 33℃ for the final temperature of oil.
Jim Mueller
The answer for 1c is 33℃ for the final temperature of oil.
Jim Mueller
Correction on homework .pdf
Hi folks,
Nathan caught a typo on the homework answers. Question 2c for 20g of water, the final temp should be 141 not 131. Good catch Nathan!
Jim Mueller
Nathan caught a typo on the homework answers. Question 2c for 20g of water, the final temp should be 141 not 131. Good catch Nathan!
Jim Mueller
Thursday, November 6, 2014
11/4 chem update and homework due 11/11
Hi folks,
Today we did a very complicated and detailed lab where we tried to determine the specific heat of lead. Next week we will talk about this a bit more and go over some of these heat problems. We will also add a couple of more things to this heat/temperature concept.
Homework for this week is to finish the lab that you started in class (the specific heat of lead is included in the .pdf).
AND complete the enclosed .pdf. I included the answers at the bottom so that you can test to see if you really understand the problems. These problems will be on an upcoming quiz so be sure to understand them as best as you can. Feel free to email me if you get stuck.
Today we did a very complicated and detailed lab where we tried to determine the specific heat of lead. Next week we will talk about this a bit more and go over some of these heat problems. We will also add a couple of more things to this heat/temperature concept.
Homework for this week is to finish the lab that you started in class (the specific heat of lead is included in the .pdf).
AND complete the enclosed .pdf. I included the answers at the bottom so that you can test to see if you really understand the problems. These problems will be on an upcoming quiz so be sure to understand them as best as you can. Feel free to email me if you get stuck.
Wednesday, October 29, 2014
Tuesday, October 21, 2014
10/21 Chemistry update and homework due 10/28
Hi folks,
Today we took a look at the five phases of matter, phase change and the relationship between heat, temperature and phase change.
Homework this week is to:
Answer the following questions
Do the enclosed worksheet .pdf.
Create a temperature vs. time graph of your data from the lab this week. Please put both the oil and the water on the same graph. Feel free to have your temperature axis go from 90℉ to 130℉ (instead of 0 - 130)
1. What are the five phases of matter?
2. Describe what happens, molecularly, as a solid increases in temperature and changes phases. Be sure to include a description of the bonds and how they change over the process. Also, what would temperature be doing over time as this substance changed temperature.
3. List the states of matter from least amount of kinetic energy to greatest amount of kinetic energy.
4.
Today we took a look at the five phases of matter, phase change and the relationship between heat, temperature and phase change.
Homework this week is to:
Answer the following questions
Do the enclosed worksheet .pdf.
Create a temperature vs. time graph of your data from the lab this week. Please put both the oil and the water on the same graph. Feel free to have your temperature axis go from 90℉ to 130℉ (instead of 0 - 130)
1. What are the five phases of matter?
2. Describe what happens, molecularly, as a solid increases in temperature and changes phases. Be sure to include a description of the bonds and how they change over the process. Also, what would temperature be doing over time as this substance changed temperature.
3. List the states of matter from least amount of kinetic energy to greatest amount of kinetic energy.
4.
Thursday, October 16, 2014
Wednesday, October 15, 2014
10/14 Chemistry update and homework due 10/21
Hi folks,
Today we began a new unit on heat and temperature. To get the ball rolling, we spent time talking about what temperature is, and the three ways to measure it. We also did a lab where we heated water from solid form to liquid form and recorded the temperature every 30 seconds. Due to timing and power issues the data didn't turn out as "clean" as I would have liked so I've created a data table for this week's lab and included it below.
For homework this week:
Complete the enclosed .pdf.
Use the included data table to create a graph that relates to the lab we did in class. Label the graph with the "notes" I've included in the table.
Today we began a new unit on heat and temperature. To get the ball rolling, we spent time talking about what temperature is, and the three ways to measure it. We also did a lab where we heated water from solid form to liquid form and recorded the temperature every 30 seconds. Due to timing and power issues the data didn't turn out as "clean" as I would have liked so I've created a data table for this week's lab and included it below.
For homework this week:
Complete the enclosed .pdf.
Use the included data table to create a graph that relates to the lab we did in class. Label the graph with the "notes" I've included in the table.
Sunday, October 12, 2014
Thursday, October 9, 2014
10/7 Chemistry update and homework due 10/14
Hi folks,
We did a bit more work with the basics of energy today. Specifically, taking a look at conservation of energy and energy efficiency. We did a lab to evaluate the energy efficiency of a pendulum.
The book really doesn't go into enough detail as far as the basics of energy goes, so I'm including an eBook version of my Bite-Size Physics: Energy book for more background.
Homework this week is to:
1. Read the enclosed eBook up to the Vibrations chapter.
2. Do the "Did you Get it" questions at the end of the Energy chapter.
3. Do the "Did you Get it" and the "A Little Math" questions at the end of the Kinetic and Potential Energy chapter.
4. Finish the lab from class. You should have the potential energy from each swing, the potential energy lost after each swing, the energy efficiency of each swing and, lastly, an overall energy efficiency average.
We did a bit more work with the basics of energy today. Specifically, taking a look at conservation of energy and energy efficiency. We did a lab to evaluate the energy efficiency of a pendulum.
The book really doesn't go into enough detail as far as the basics of energy goes, so I'm including an eBook version of my Bite-Size Physics: Energy book for more background.
Homework this week is to:
1. Read the enclosed eBook up to the Vibrations chapter.
2. Do the "Did you Get it" questions at the end of the Energy chapter.
3. Do the "Did you Get it" and the "A Little Math" questions at the end of the Kinetic and Potential Energy chapter.
4. Finish the lab from class. You should have the potential energy from each swing, the potential energy lost after each swing, the energy efficiency of each swing and, lastly, an overall energy efficiency average.
Monday, October 6, 2014
Answers for this week's homework
Hi folks,
Several folks have emailed me indicating that they are not quite sure if they are getting it for this week's homework. Here are the answers to the math problems. Be sure to do the problems FIRST before looking at the answers. Also, if you get it wrong, redo the problem and be sure you know how to do it. This material will be quizzed on so be like a Boy Scout and "Be Prepared". :)
1. 400x2=800 joules (100lbx4=400 newtons)
1 calorie= 4.184 joules
1 Joule = .2389 calories
800x .2389 = 191.12
3. 40x400 = 16000 joules
.2389x16000 = 3822 calories
4. 1.3x10^8 = 130,000,000/400 = 325000 meters
7. 10,000 = F x 4
F = 2500N
Several folks have emailed me indicating that they are not quite sure if they are getting it for this week's homework. Here are the answers to the math problems. Be sure to do the problems FIRST before looking at the answers. Also, if you get it wrong, redo the problem and be sure you know how to do it. This material will be quizzed on so be like a Boy Scout and "Be Prepared". :)
1. 400x2=800 joules (100lbx4=400 newtons)
1 calorie= 4.184 joules
1 Joule = .2389 calories
800x .2389 = 191.12
3. 40x400 = 16000 joules
.2389x16000 = 3822 calories
4. 1.3x10^8 = 130,000,000/400 = 325000 meters
7. 10,000 = F x 4
F = 2500N
Thursday, October 2, 2014
Wednesday, October 1, 2014
10/1 Chemistry update and homework due 10/8
Hi folks,
Today we did a quick overall look at the concept of energy. We will be dealing with the concept of energy a lot throughout this class and today's lecture was meant to give an nice overall background regarding what energy is and what it does.
Homework for this week:
Read the content on this website up to the section on Power.
Answer the following questions.
1. How many Joules would it take to walk up a 2 meter (about 6 feet) flight of stairs if you weigh 100 lbs? (Remember to convert to Newtons. One Newton is equal to 4 lbs so multiply the weight by 4.) How many calories would that be? How many times would you have to walk up (remember down doesn't count) that flight of stairs to burn off the Calories from a Snickers bar (250 Calories (remember that's 250,000 calories))? The formula for work is W=FD.
2. Why doesn't down count in the above problem?
3. If it takes about 40 Newtons of force to push a lawn mower and you push it 400 meters to cover the entire lawn, how much work do you do? In Joules? In calories?
4. A gallon of gas has 1.3x10^8 J of energy. (that carrot means that the 8 is an exponent. So the number is 1.3 x 10 to the 8th.) How far can a car go if it takes 400 N of force to keep it going?
5. What is potential energy? Give 3 examples.
6. What is kinetic energy? Give 3 examples.
7. If it takes 10,000 J of energy to push a refrigerator 4 m (12 ish ft.) across a kitchen what force does it take to push that fridge?
8. Look up 3 of your favorite activities and tell me how many Calories it takes to do them? How many Joules would that be?
Wednesday, September 24, 2014
9/23 Chemistry Update and Homework due 9/30
Hi folks,
Today we took some time taking a look at the concepts of causation vs. correlation by looking at some very strange correlations using graphs. We also saw how easy it is to create a graph that gives a false impression of the results. Finally, we finished the density lab we started last week and explored the concept of buoyancy a bit as well.
Homework for next week is to:
Read pages 26-28 in the Conceptual Chemistry book. (Including the part in green.)
Give me 3 examples of a correlation that has no causation. (Ex. Full moon and a busy ER.)
Give me 3 examples of a correlation that does show causation. (Ex. Taking Advil and curing a headache.)
Find the volume, the mass and the density of something at your house.
On page 33 do questions #41 - 44
On page 34 do questions #10, 13 - 19
Answer the following questions.
1. If an object has a mass of 23.4g and a volume of 45ml what is it's density? Will it float in water?
2. If an object has a density of .001g/ml and you have a 90 liter sample of it…what's its mass? (Be sure to convert units here!)
3. If you have 23 kg of gold (yay for you!) how much gold (volume) do you have? (Use the magical internets to look up the density of gold.)
4. Again, with the help of the magical internets, find the metals with the 5 greatest densities. What is the least dense metal?
Today we took some time taking a look at the concepts of causation vs. correlation by looking at some very strange correlations using graphs. We also saw how easy it is to create a graph that gives a false impression of the results. Finally, we finished the density lab we started last week and explored the concept of buoyancy a bit as well.
Homework for next week is to:
Read pages 26-28 in the Conceptual Chemistry book. (Including the part in green.)
Give me 3 examples of a correlation that has no causation. (Ex. Full moon and a busy ER.)
Give me 3 examples of a correlation that does show causation. (Ex. Taking Advil and curing a headache.)
Find the volume, the mass and the density of something at your house.
On page 33 do questions #41 - 44
On page 34 do questions #10, 13 - 19
Answer the following questions.
1. If an object has a mass of 23.4g and a volume of 45ml what is it's density? Will it float in water?
2. If an object has a density of .001g/ml and you have a 90 liter sample of it…what's its mass? (Be sure to convert units here!)
3. If you have 23 kg of gold (yay for you!) how much gold (volume) do you have? (Use the magical internets to look up the density of gold.)
4. Again, with the help of the magical internets, find the metals with the 5 greatest densities. What is the least dense metal?
Saturday, September 20, 2014
A great article you may want to take a look at.
Hi folks,
This article does a great job explaining what goes into a can of Coke. From mining the aluminum, to getting it to the store and everything in between. Lots of great "real world" chemistry here. Take a look.
Never Stop Wondering
"Science Jim" Mueller
(919) 338-6142
A Fun Approach to Serious Physics!
Join my Facebook page!
Wednesday, September 17, 2014
Chemistry update 9/16 and homework due 9/23
Hi folks,
Today we spent quite a bit of time going over some basic math skills needed for class this year, such as, exponential notation, significant figures and metric prefixes. We also touched slightly on the concept of density which we will spend more time on next week.
Homework due 9/23
Read pgs. 1 - 16 in the text book.
Answer Review Questions #'s 5 - 21
Also, answer the following questions.
1. How many significant figures in the following numbers:
a. 23401
b. 34.003
c. .0085
d. 34000
2. Convert the following into exponential notation:
a. 23100000
b. 79.01
c. .000000429
3. Convert the following from exponential notation to normal notation:
a. 3.08 x 10^4 (^ means the following # is the exponent)
b. 9.086 x 10^-8
Today we spent quite a bit of time going over some basic math skills needed for class this year, such as, exponential notation, significant figures and metric prefixes. We also touched slightly on the concept of density which we will spend more time on next week.
Homework due 9/23
Read pgs. 1 - 16 in the text book.
Answer Review Questions #'s 5 - 21
Also, answer the following questions.
1. How many significant figures in the following numbers:
a. 23401
b. 34.003
c. .0085
d. 34000
2. Convert the following into exponential notation:
a. 23100000
b. 79.01
c. .000000429
3. Convert the following from exponential notation to normal notation:
a. 3.08 x 10^4 (^ means the following # is the exponent)
b. 9.086 x 10^-8
Wednesday, September 10, 2014
Chemistry update 9/9
Hi everyone,
It's great to get started! Looks like we should have a good group of folks and an excellent class.
Today we took some time to give a brief overview about what science is, what does it mean, and how does it work.
Here's the link to the recording for this week.
Lastly, I've also included the .pdf of the syllabus for this year.
Never Stop Wondering
"Science Jim" Mueller
(919) 338-6142
A Fun Approach to Serious Physics!
Join my Facebook page!
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