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.