Good morning and welcome to Chemistry.

We continue with Equilibrium this week by looking at gases and the pressures of individual gases and how these contribute to the total pressure.

Dalton’s Law of Partial Pressures says that the individual pressures of each gas in a mixture of gases will add up to the total pressure.

So if a balloon contains a pressure of 29 kPa of helium, 1 kPa of oxygen and 10 kPa of Nitrogen, the total pressure of the balloon is 40 kPa. KiloPascals and MegaPascals are units of pressure. The English units (like for your car tires) might be measured in pounds per square inch or PSI.

This week’s Gizmo takes you through some interesting equilibrium simulations. I found that if you let the simulation run for a minute or two then pause it is easier to record the data.

Go to explorelearning.com and do the Equilibrium and Pressure Gizmo. Answer each question thoroughly and send results via Remind by 10 a.m. Friday. Also, do the Assessment located below the Gizmo. It is a tough one.

Good luck and stay healthy!

T. Brown

Good day and welcome to chemistry. Happy Memorial Day.

This week is all new stuff. This week puts the equal in equilibrium. Make sure you read the entire Student Exploration and do all the work, either on printed copies of the SE or handwritten answers either of which you will send to me in Remind. And, as always, please do the Assessment below the Gizmo. I only got 4 out of 5 this week, so it is tough. You’ll need a calculator.

This week’s Gizmo is called Equilibrium and Concentration. When a chemical reaction is reversible it can go forwards (with lots of reactants) or backwards (with lots of product). You’ll be manipulating both the products and the reactants and observing how it all shakes out.

Good luck.

Stay healthy.

Stay breezy.

T. Brown

Good morning and welcome to Chemistry.

This week’s assignment is the last one for our few seniors. Congratulations to the class of 2020. You are unique.

Seniors please turn in this week’s assignment by Thursday. All others turn in your work by Friday at 10 a.m.

The Gizmo in explorelearning.com is about the Ideal Gas Law.

Pressure, Temperature and Volume of a gas are all affected by the amount of a gas. Avogadro worked extensively with gasses in Italy back in the 1700s. He found that the number of moles influenced these factors.

Today, we use the variable n for number of moles.

Our Pressure (P) units this week are in atmospheres. We live at approximately 1.00 atmosphere of pressure from the air around us.

Our Temperature (T) units continue to be in Kelvins (K). This is an absolute temperature scale useful for these equations. Imagine using Fahrenheit or Celsius and having to put a value of zero in the equation. That would be janky. Kelvin never gets so cold so as to be zero.

Our Volume (V) units this week are the familiar liters, L. At one atmosphere (1 atm), one mole (1 mol) of an ideal gas at a temperature of 273 K (0 degrees Celsius) will have a volume of 22.4 L. This is a fixed quantity you should know for AP Chemistry next year. These values are standard temperature and pressure (STP).

There is an Ideal Gas Law constant that we give the designation of R. (Nothing to do with pirates.) This will change depending on the units we use for P and V. But, for this week we don’t use this value too much.

The Ideal Gas Law is known as PV=nRT.

Go to explorelearning.com and do the Student Exploration Sheet in its entirety. Take pics of your work and send them to me in Remind.

For your check in this week our Monday meeting for 3rd hour needs to be postponed due to senior day at DHS that I will be attending.

So, Tuesday 4th hour meets at 1:00 p.m. as always. CJPCNP is the code for iLearn and the Big Blue Button for 4th hour. I’m not sure if caps are important but it is all lowercase on the website.

Wednesday 3rd hour will video conference at 1:00 p.m. IZJJQB

Our makeup meeting will be Thursday at 1:00 p.m. Use the 4th hour code and BigBlueButton, please. I will figure it out if you are in 3rd hour, usually. It would be best for 3rd hour folks not to miss Wednesday.

I hope you are healthy and safe. We are doing fine so far. But, people are still getting COVID-19, so be careful.

T. Brown

Good morning and welcome to Chemistry!

I hope you are all doing as well as can be expected under difficult circumstances. We will be discussing COVID-19 and other topics of interest this week as we renew our video chats. We will be using iLearn’s Big Blue Button. Look for your hour’s button in the General/Welcome page of iLearn:

https://moodle.dearbornschools.org/course/view.php?id=409

Both hours 3 and 4 are listed. Make sure you join YOUR hour at the specified time.

3rd hour Monday at 2:20 p.m.

4th hour Tuesday at 1:00 p.m.

This week’s assignment is another Gizmo from Explorelearning.com. We are doing the gas laws, specifically Boyle’s and Charles’ Laws with a little Gay-Lussac thrown in for good measure.

You are required to check in for the video chat and do the Student Exploration worksheet and the Assessment Questions under the Gizmo. Finish by 10 a.m. Friday.

Many of you have been doing great work during this weird blip in your education. And, although education is important, sometimes our health or family are more important. I understand this and try to be as flexible as possible. Dr. K will be joining us in the video chat, I think, and she is very accessible to those of you who need assistance, especially with the language.

The crux of this week’s work is thinking of a balloon that you’ve blown up and tied off. Add heat to it and it expands. Cool it down and it gets smaller. The size of the balloon is the volume and is measured in a variety of units, but this week we will be using cubic meters or m³.

Temperature is a measure of the average kinetic energy of the particles in the sample of matter. It’s how fast they are moving. We think of temperature usually in degrees Fahrenheit (it was freezing yesterday 32F), but we measure in Celsius in the chemistry lab and we will have to use Kelvin (K) for gas laws.

The pressure a gas exerts on an object is the force per unit area. A higher temperature in a closed container means more pressure. A smaller volume will mean a higher pressure. Pressure can be measured in a variety of units also, but this week we will use N/m³. Or, newtons per cubic meter. If you took physics you’ll recall that Newtons are a unit of Force.

There is a little math this week, so you may need a calculator. Also, this will be much easier on a computer than a phone (I think). The two glitches I had were in Activity C. I couldn’t change the mass to 15 kg. and the 400K temperature gave weird results. Oh, and you’ll need to use Google docs to make your graph.

I hope to see you all either Monday or Tuesday. Stay healthy and stay breezy!

T. Brown

Happy Sunday and welcome to Chemistry!

I hope you are all doing well, staying safe and healthy.

Many of you did great work on the last two Gizmos and sent me your work in Remind. We will follow that plan this week, also.

The video get togethers will have to wait another week unfortunately. I’m still working on learning the Big Blue Button. But, to start, you’ll need to make sure you are enrolled in Mr. Brown’s iLearn course for Chemistry. There is a 3rd hour enrollment code and a 4th hour enrollment code. Make sure (MA Faraj) you sign in to your correct hour. Do NOT share the code with anybody outside of our class. It will just mess up stuff and get them (and you) in big trouble.

I will send the enrollment codes in today’s e-mail. Make sure you read it and enroll in the Chemistry iLearn. This will be essential for video conferencing later.

To check in this week, just say: “I love Gizmo!” in Remind. That way I can give you credit for continuing in this class.

This week’s lesson is pretty long and involved compared to the last two. I’m asking you to do all of it (on your own, of course). If you get stuck in the Gizmo, send me a Remind or ask a friend. But, please don’t just copy somebody else’s work. You want to learn the information as well as get a grade. Copying somebody jeopardizes both of those goals.

The Gizmo this week (exporelearning.com) is called “moles”. If you can print out the Student Exploration sheet to fill in as you use the Gizmo that would be ideal. Then send me a pic of Activity A and B results. If you cannot print, just write down your answers. Send me the four pictures in Remind. Part C is also required, but I do not need the pictures.

MAKE SURE you do the assessment questions under the Gizmo. If you did not do the last two week’s, go back and try them. I’m using that as part of your check-in and work grade. Thank you.

So, to summarize:

1. Send a note to me in Remind saying “I love Gizmo!”.
2. Do the Moles lesson by printing the Student Exploration Sheet and filling it in with your best answers.
3. Take pictures of your answers and send them to Mr. Brown in Remind.
4. Take the Quiz at the bottom of the Gizmo.
5. Finish by Friday at 10 a.m.

Thank you,

Stay home.

Stay healthy.

Stay breezy.

T. Brown

Good day and Welcome to Chemistry!

Our normal check-in procedure has been changed due to nefarious persons. We may try the Big Blue Button next week, but for this week our check-in will simply be a “I got the Assignment” in Remind. So, by Monday at 8 p.m. if I don’t hear from you it will be a problem.

The assignment this week is in explorelearning.com, again. If you didn’t get into a class last week you should do so this week.

3rd hour class code is: B57HL7

4th hour class code is: BCKWLF

The assignment name is “Chemical Equations”. Last week was “Balancing Chemical Equations”. You’ll need a periodic table and a calculator.

Look at the Student Exploration worksheet and either print it out, or write down the Headings (letters and/or numbers) and fill in the blanks. For Activity B4 there is an excessive number of balancing equations which we did last week. Just do the first one in each set. So, instead of 15, you should do 5 of them. Use the Gizmo to help.

Write down all your answers on one or two sheets of paper. Take a picture and send it to Mr. Brown in Remind. If he asks you to fix any problem(s) you may need to re-submit the corrections.

Finally, do the assessment questions. Do your own work both in the assessment and the worksheet. I’d rather you get wrong answers than copy someone else. I will give you a zero for copying. The assignments this spring will be due on Fridays by 10 a.m. You can turn them in much sooner, especially if you want early feedback.

If you have questions ask via Remind this week. E-mail works sometimes, but I check Remind a little more often.

Good luck and keep learning!

T. Brown

Good day and welcome to chemistry. I know it seems weird to call this “Week 1”, but we are living in weird times. I sent out an e-mail today that said:

Good Day and Welcome to Chemistry:  We are trying to do some good review before doing any new chemistry.  So, we are asking our chemistry students to go to  explorelearning.com and sign up for Gizmos.  Use your real name and school e-mail.  The class code for 3rd hour is B57HL7.  Also, we will be having a Google Hangout on Monday from 2:20 -3:00 p.m. The “Nickname” for our first third hour hangout will be Week1Breezy.  Remember, this is our first time hanging out, so there might be a couple of hiccups.  Be patient.  Be sure to log in with your name.  You’ll be asked to add a comment to verify that you showed up.  If you can’t make it for a legitimate reason, please contact me and we can try again on Wednesday.  Look for information on my iBlog.  Look in Remind.  Look in your school e-mail.  If you fail to show up and don’t do the work you cannot receive a grade in chemistry for the semester.  The administration requires that I give them the names of recalcitrant students.Basic etiquette (the norms) for a hangout:1.  Be on time.2.  Find a quiet place free from distraction.3.  Maintain respect in speaking, writing and appearance.  4.  Stay on mute unless you have something relevant to contribute.5.  Video needs to remain ON to promote focus.  Eye contact should be maintained.6.  Refrain from chewing gum, eating and drinking in front of the camera.  
Look for the week’s assignment in the iBlog on Sundays by noon.  The work will be due by Friday at 10 a.m.  Do your best.  Do your own work.  Contact Mr. Brown via Remind if you get stuck somewhere.  The code for Remind in chemistry is @Brownd5.  
Thank you!  See you Monday!T. BrownTeacher of Chemistry

The 4th hour information is very similar except:

 The class code for 4th Hour is BCKWLF.  Also, we will be having a Google Hangout on Tuesday from 1:00 to 1:40 p.m. The “Nickname” for our first 4th hour hangout will be Week1Breezy4.

Good morning and welcome to Chemistry!

The DHS chemistry teachers are meeting tomorrow to finalize our plan for the rest of the school year. Although we’ve been doing some good enrichment/review the past month, we have changes coming up.

On Monday, we will begin doing Google Hangouts in the early afternoon. I’m trying to figure out how to do that, since it is all new to me. But, if you can be patient with me the first couple of times I’m sure we’ll figure it out.

Thanks and Stay healthy.

T. Brown

Good morning and welcome to Chemistry!

Today’s refresher is on density. Our old friend density is defined as a physical property of matter and can be described as the amount of mass per unit volume. Or, D=M/V.

If we use mass in grams (g) and volume in cubic centimeters (cm³) our density units will be in g/cm³ .

If you draw the “Triangle of Science” with D=M/V, all you have to remember is to put the mass in the top part of the triangle. The rest work out just fine.

So, three quick questions for practice:

1. What is the density of a sample of metal if the volume is 12 cm³ and its mass is 24 g?
2. Tin has a density of 7.31 g/cm³. If you have a 14.62 g sample of tin, what will be its volume?
3. If you have a 100 cm³ sample of tin what will be its mass?

Please show all your work on paper and send a picture of that paper to Mr. Brown in Remind. Include proper units in your final answer, of course.

Thank you.

Stay safe and stay Breezy!

T. Brown

Good morning and welcome to chemistry! Welcome back from Spring Break.

I sent out a “Remind” for 3rd hour to help Mr. Patterson with a Dearborn School District survey. They want to know who has internet access and a device to access the internet. Please respond with your situation.

The COVID-19 pandemic is a case of science meets the real world. It’s mostly biology, but I’m sure many of you have heard about the hydroxychloroquine the president and others have been touting as a miracle cure. We have a saying in science: “If it sounds too good to be true, it probably is.” That doesn’t mean there aren’t amazing, useful ideas and people in our lives. But, it’s good to be at least a little skeptical. That is a hallmark of science…the skepticism, the need for proof.

Your “welcome back” assignment today is to send me a paragraph or so (in Remind) of how the coronavirus has affected you directly. I know you all have to stay home and stay safe. But, have you seen any direct evidence of the virus? Friends, family members? Mild symptoms, hospitalizations? Don’t be too graphic, but it might be good to share some personal stories to give us a better feel of why we are all supposed to be isolated. Thanks!

Stay healthy and Stay Breezy!

T. Brown