Derived Quantity Conversion -- Chemistry 11 by Ria Park

Meaning

A derived quantity is when there is more than one SI unit in a single quantiy

e.g. Convert 50 ㎞/h into m/min

                                          First. ㎞ -> m

                                                  use 1km = 1000m

                                      Second. h -> min

                                                  use 1h = 60min

So the calculation would be like this :

          50㎞/h X 1000m/1㎞ X 60min/1h = 3000000 m/min


More examples :

              1) Convert 1mg/dL into g/L

                 1mg/dL X 1g/1000000 X 1km/100m = 1 X 10^-7 g/L


             2) Convert 1㎝/㎲ into ㎞/s

                  1㎝/㎲ × 10^6㎲/1s × 1m/10^2㎝ × 1㎞/10^3m = 10㎞/s


              3) Convert 36.4㎣ into ㎥

                   36.4㎣ × 1m/10^3㎜ ×  1m/10^3㎜ × 1m/10^3㎜
                           = 36.4㎣ × 1㎥/10^9㎣
                           = 3.64 × 10^-8㎥