TEMA PARA LA MATERIA DE QUÍMICA...t/t

1. Conversions
QBA Miguel A. Castro Ramírez

2. Dimensional Analysis
 Dimensional analysis
– the technique of
converting between
units
 Conversion factor –
an equation (or
fraction) always
equal to 1

3. Examples…
 How many liters
are in a kiloliter?
 How many
milligrams are in a
gram?
 How many
centimeters are in
a meter?

4. Conversion Factors
 Consist of two equal values on the
top and bottom of a fraction.
 Example: 100 centimeters
------------------
1 meter

5. Steps for Converting
1. On the left, write
an “x” followed by
the unit you are
looking for.
2. Next to that, write
“=” and write the
value and unit you
are given.

6. Steps for Converting
3. Choose a
conversion factor
that relates those
two units.
4. Place the value
with the unit you
HAVE on the
bottom and the
value with the unit
you ARE LOOKING
for on the top.

7. Steps for Converting
5. Cancel units.
6. Multiply by top
numbers. Divide
by bottom.
7. Write your answer
on the right side.
8. CIRCLE IT!

8. EXAMPLE!!!!!
 Convert 56 cm to meters.
 This problem could also be written as
“56 cm is how many meters?”

9. EXAMPLE!!!!!
 Convert 7 milliliters to liters.
 This problem could also be written as
“How many liters are in 7 milliliters?”

10.  2.5 miles is equal to how many feet?
 Happy first “A” bell of the year! How
many seconds long is an “A” bell?
(It’s 45 minutes.)