Chemistry Class tomorrow

Hi folks,

I hope folks are doing OK with the stoichiometry stuff we introduced last week.  It's pretty confusing so we will spend some more time tomorrow doing some problems together.  Just to let you know, there will be a quiz tomorrow but it won't include the problems on this week's homework.  However, it will be asking you to convert measurements to moles and moles to measurements (the stuff you did for homework the week before this) so be sure you get that down pat.

Here is a bunch of worksheets with answers for you to practice.  This isn't homework, just extra problems if you want them.

Best,

Jim Mueller

(919) 907-3217

1/25 Chemistry update and homework due Feb 1

Hi folks,

Today we took our wonderful new found skill of using the mole as a tool and began to use it as it was meant to be used, in chemical equations.  

For homework this week, you guessed it,  practice this wonderful new skill.  Please do the enclosed .pdf.  Full explanations of the solutions are included at the bottom.   This author solves the problem using unit conversion which is fine to use if you wish.  Personally, I find the "Unknown over Known" ratio to be easier but whichever works for you is fine.

Good luck folks.  Remember, feel free to rewatch the recording if you'd like to see the walk through again.

Best,

Jim Mueller

(919) 907-3217

1/25 HS Chemistry Recording - Stoichiometry

https://youtu.be/WIGH67QWNjY

1/18 Chemistry Recording - Mole Conversions

https://youtu.be/GuSvsos7kFg

1/18 Chemistry update and homework due 1/25

Hi folks,

Today we spent a lot of time learning how to work with the concept of the mole. We did several conversions from moles, to mass, to liters and to particles and back again. The mole is just amazing! :)

For homework this week I've got another wonderful worksheet filled with endless problems. You can do them while you're watching the eclipse! The answers are included and they are the first page so try no to peek as you scroll down the document. :)

By the way, for number 2, just do a to e. Feel free to do the rest if you wish.

The Worksheet for the homework

I sent all the instructions and forgot to included the worksheet!  

Here you go.

1/12 Chemistry Recording - Review

https://youtu.be/eQ3v-5AWg9w

1/11 Chemistry update and homework due 1/18

Hi folks,

Today we took the time to try to really solidify what we've been working on up to now.  We want to make sure everyone has a pretty firm grasp on how to "read" chemistry.  We also continued to ease in to the concept of the mole.

For homework this week, please do the following questions in the enclosed worksheet.   There are a lot of question but they are very quick.  This is very similar to what we did in class this week but she uses the term OWL instead of Mueller.  So, for this worksheet, assume that an OWL is 6 of anything.

This worksheet's kind of odd so don't hesitate to ask if you have any questions about what to do.

Page 3, do every other question

Page 4, do every other question

Page 6, do every other question

Page 7, do every other question

Page 9, do all the questions

Page 10, do every other question.

Page 12 do all of #3 and #4  (They are asking you to work with real molar mass here.)

Last but not least, please do the following conversions.  This is going to be very typical to the type of math you are going to be doing with moles.  I've included the answers below so you can check yourself.

Notice on the following problems that you are converting mass to Mueller's/OWLS and then using that result to convert Mueller's/OWLS to numbers of pieces.

1. If you had 400 g of Hot Wheels Cars, how many would you have?

2. If you had 45g of pennies, how many would you have?

3. If you had 5g of foam balls, how many would you have?

Notice on the following problems that you are converting numbers of pieces to Mueller's/OWLS and then using that result to convert Mueller's/OWLS to mass.

4. If you had 600 Popsicle sticks, what mass would you have?

5.  If you had 3600 poker chips, what mass would you have?

Here are the Mueller Masses we found in class.  Use these for the Mueller/OWL mass questions.

Popsicle Sticks 8.5g

Pennies             15g

Poker Chips       42g

Hot Wheels Car 200g

Foam Balls         10g

Answers for the questions in the email. 

1.  400g/200g = 2 muellers of cars.   2 x 6 = 12 cars

2.  45/15 = 3 muellers of pennies.  3 x 6 = 18 pennies.

3.  5/10 = .5 muellers of foam balls.  .5 x 6 = 3 foam balls

4.  600/6 = 100 muellers of popsicle stick.  100 x 8.5 = 850g

5.  3600/6 = 600 muellers of poker chips.  600 x 42 = 25,200g.