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In chemistry, it is often useful to be able to convert from one unit of measure to another

In chemistry, it is often useful to be able to convert from one unit of measure to another. For example: mass of a substance converted to the number of atoms in that substance, or converting from one metric unit to another metric unit. First we will see how it works with dozen.

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In chemistry, it is often useful to be able to convert from one unit of measure to another

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  1. In chemistry, it is often useful to be able to convert from one unit of measure to another For example: mass of a substance converted to the number of atoms in that substance, or converting from one metric unit to another metric unit

  2. First we will see how it works withdozen.

  3. You know that a dozen is 12 of something. If you have 36 donuts, how many dozen donuts do you have?

  4. Use this relationship to convert from individual donuts to dozen donuts: You want to know how many dozen in 36 donuts, and you know there is 1 dozen per 12 donuts, or 1 dozen 12 donuts

  5. 1 dozen 12 donuts 36 donuts x In the problem how many dozen in 36 donuts, you know there is 1 dozen per 12 donuts, or 1 dozen Use this relationship to convert from individual donuts to dozen donuts: 12 donuts

  6. In the problem how many dozen in 36 donuts, you know there is 1 dozen per 12 donuts, or 1 dozen Use this relationship to convert from individual donuts to dozen donuts: 12 donuts 1 dozen 12 donuts 36 donuts x 1 dozen 12 donuts 36 donuts x =

  7. 36 dozen 12 = In the problem how many dozen in 36 donuts, you know there is 1 dozen per 12 donuts, or 1 dozen Use this relationship to convert from individual donuts to dozen donuts: 12 donuts 1 dozen 12 donuts 36 donuts x 1 dozen 12 donuts 36 donuts x =

  8. 36 dozen 12 = 3 dozen = In the problem how many dozen in 36 donuts, you know there is 1 dozen per 12 donuts, or 1 dozen Use this relationship to convert from individual donuts to dozen donuts: 12 donuts 1 dozen 12 donuts 36 donuts x 1 dozen 12 donuts 36 donuts x =

  9. 36 dozen 12 = 3 dozen = In the problem how many dozen in 36 donuts, you know there is 1 dozen per 12 donuts, or 1 dozen Use this relationship to convert from individual donuts to dozen donuts: 12 donuts 1 dozen 12 donuts 36 donuts x 1 dozen 12 donuts 36 donuts x =

  10. 3 dozen = 36 donuts

  11. there are 12 donuts in 1 dozen 12 donuts 2.5 dozen x 1 dozen If you have 2.5 dozen donuts, how many individual donuts are there?

  12. 2.5 dozen x 12 donuts 1 dozen 2.5 x 12 donuts = 1 30 donuts = If you have 2.5 dozen donuts, how many individual donuts are there? 12 donuts 2.5 dozen x = 1 dozen

  13. notice the two conversion factors are reciprocals of each other Here are the two problems side by side: 2

  14. = 1 = 1 12 donuts 1 dozen 1 dozen 12 donuts 12 donuts = 1 dozen

  15. converts donuts to dozen 12 donuts 1 dozen 1 dozen 12 donuts 12 donuts = 1 dozen = 1 = 1

  16. converts dozen to donuts 12 donuts 1 dozen 1 dozen 12 donuts 12 donuts = 1 dozen = 1 = 1

  17. Since conversion factors always equal 1, you can multiply them by anything you want and still end up with the same thing except that it will be in a different form

  18. Let’s try converting donut mass to number of donuts…

  19. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams?

  20. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? What’s the conversion?

  21. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? 1. what is the qestion asking you to convert?

  22. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? 1. what is the qestion asking you to convert? grams to donuts

  23. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? 2. what is the relationship between grams and donuts?

  24. If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? 2. what is the relationship between grams and donuts? 150 grams = 1 donut

  25. 3. set up the conversion factors:

  26. 150 g 1 donut = 1 1 donut 150 g = 1 150 g = 1 donut so… and

  27. 150 g 1 donut = 1 1 donut 150 g = 1 150 g = 1 donut these are your conversion factors

  28. 150 g 1 donut = 1 1 donut 150 g = 1 150 g = 1 donut converts donuts to grams (grams on top)

  29. 150 g 1 donut = 1 1 donut 150 g = 1 150 g = 1 donut converts grams to donuts (donuts on top)

  30. The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams?

  31. begin with the amount given in the problem The question is… 9900 grams If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams?

  32. The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams?

  33. The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? each donut has a mass of 150 grams

  34. converts grams to donuts The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? each donut has a mass of 150 grams

  35. The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams?

  36. The question is… If you have 9900 grams of donuts, how many donuts do you have if each donut has a mass of 150 grams? how many donuts do you have

  37. =

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