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**Converting the Big Kids Way!**

Dimensional Analysis Converting the Big Kids Way!

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**So Go Back to Conversions**

1 m = __________ mm 1 000 1 m = 1000 mm 1 m = 1 1000 mm .

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**Other Conversions 100 cm = 1 m 1000 g = 1 kg 10 dL = 1 L 1 m = 1**

OR OR OR

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**Find the conversions on your periodic table**

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**Dimensional Analysis First know what you START WITH!**

Don’t forget units Don’t lose decimal point Second know what you END WITH It is usually unknown except for the unit.

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**Put it together Start: 360 s End: x ms 360 s x (some conversion)**

(rest of conversion)

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**Put it together Think: Which gets rid of “s” So you have to use “ ” S**

S x S OR S

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**Put it together Start: 360 s End: x ms 360 s x (some conversion) =**

something “s” S

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**Put it together Start: 360 s End: x ms**

We want “ms” so it goes in the numerator 360 s x something “ms” something “s” Find the conversion on your periodic table

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**Put it together Periodic Table: 1 ms = 1 x 10-3 s 1 ms . 1 x 10-3 s OR**

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**Put it together Start: 360 s End: x ms End: x ms Which works better?**

360 s x 1 ms . 1 x 10-3 s 1 x 10-3 s 1 ms

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**Put it together 360 s x Put it in your calculator 360,000 ms 1 ms .**

1 x 10-3 s

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**Steps to Dimensional Analysis**

Label start (with unit) Label end (with unit) Identify conversion factor Set up railroad Write answer Sig Fig final answer

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Practice Convert 12 moles H to grams H.

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Dimensional Analysis The importance of units in calculations.

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