1. CH. 1 - MEASUREMENT
Unit Conversions

2. A. SI Prefix Conversions
1. Find the difference between the exponents of the two prefixes.
2. Move the decimal that many places.
To the left
or right?

3. A. SI Prefix Conversions
Symbol
Factor
mega- M
106
kilo- k
103
BASE UNIT
---
100
deci- d
10-1
move left
move right
centi- c
10-2
milli- m
10-3
micro- 
10-6
nano- n
10-9
pico- p
10-12

4. A. SI Prefix Conversions=
532 m = _______ km
0.532
NUMBER
UNIT
NUMBER
UNIT

5. A. SI Prefix Conversions
0.2
1) 20 cm = ______________ m
2) L = ______________ mL
3) 45 m = ______________ nm
4) 805 dm = ______________ km
H.O. 32
45,000
0.0805

6. B. Dimensional Analysis
The “Factor-Label” Method
Units, or “labels” are canceled, or “factored” out, in chem it’s called DA.

7. B. Dimensional Analysis
Steps:
1. Identify starting & ending units.
2. Line up conversion factors so units cancel.
3. Multiply all top numbers & divide by each bottom number.
4. Check units & answer.

8. B. Dimensional Analysis
Lining up conversion factors:
1 in
2.54 cm
2.54 cm
1 in

9. B. Dimensional Analysis
1) Your European hairdresser wants to cut your hair 8.0 cm shorter. How many inches will he be cutting off? cm in
8.0 cm
1 in
2.54 cm
= 3.1 in or……another way?

10. B. Dimensional Analysis
2). How many milliliters are in 1.00 quart of milk? qt mL
1.00 qt
1 L
1.06 qt
1E3 mL
1 L
= 943 mL ÷ 

11. B. Dimensional Analysis
3) Taft football needs 550 cm for a 1st down. How many yards is this? cm yd
550 cm
1 in
2.54 cm
1 ft
12 in
1 yd
3 ft
= 6.0 yd

12. B. Dimensional Analysis
4. You have 1.5 pounds of gold. Find its volume in cm3 if the density of gold is 19.3 g/cm3. lb
cm3
1.5 lb
1 kg
2.2 lb
1 g
1E-3 kg
1 cm3
19.3 g
= 35 cm3

13. B. Dimensional Analysis
5. How many liters of water would fill a container that measures 75.0 in3?
in3 L
75.0 in3
(2.54 cm)3
(1 in)3
1 L
1E2 cm3
= 1.91 L

14. B. Dimensional Analysis
6) A piece of wire is 1.3 m long. How many 1.5-cm pieces can be cut from this wire? cm
pieces
1.3 m
1E2 cm
1 m
1 piece
1.5 cm
= 87 pieces

15. B. Dimensional Analysis
7). Convert 8470 s to s.
8470 s
1E6 s
= 8.47 x 109 s
1 s

16. B. Dimensional Analysis
8. Convert 6.85 nL to mL
6.85 nL
1E3 mL
= 6.85 x 10-6 ml
1E9 nL

17. B. Dimensional Analysis
9. If I was traveling down the interstate at 71 mph (m/h), what would this be in cm/s ?
*** BOTH UNITS MUST BE CONVERTED !!