1. Drill: Classify each of the following:
Filtered Sea water
Orange juice
Mercury
Salt
Pure ice water

2. Review Drill, Grade HW & Collect Both

3. CHM II HW
Review PPs 1 – 4
Work the attached assignment & turn it in tomorrow.

4. Basic Units
Length meters
Mass kilograms
Time seconds

5. Temperature Kelvin
Amount Chm Mole
Current Ampere
Luminous In Candela

6. Metric Prefixes
Mega(M) Nano(n)
Kilo(k)
Milli(m) Centi(c)
Micro(m)

7. Metric Prefixes (M) = 106 (n) = 10-9 (k) = 103 (m) = 10-3 (c) = 10-2

8. How close you are to the real answer
Accuracy
How close you are to the real answer

9. Precision
How well one can repeat his or her work
Repeatability

10. Uncertainty All measurements have a degree of unreliability
Usually in the last digit of a measurement

11. Solve the correct reading for the volume in the burette Burette
Measurements
Each
measurement
should have
2 decimals
Solve the
correct
reading
for the
volume
in the
burette 1 2 3

12. ~ 1.36 the last decimal will have uncertainty Burette Measurements
Each
measurement
should have
2 decimals
~ 1.36
the last
decimal
will have
uncertainty 1 2 3

13. Meaningful digits in a number
Significant Digits
Meaningful digits in a number

14. Multiplication Uncertainty
The answer should have the same number of significant digits as the multiplier with the least number of SD
Same for division

15. Addition Uncertainty When adding, line up decimal place & add
The decimal places in the answer should = the least
Same for subtraction

16. Determining Significance
All non-zero digits
All zeros between non-zero numbers
All trailing zeros if there is a decimal place

17. Scientific Notation
M x 10n
M = 1.00  M < 10.00
n = an integer

18. Conversion Factor Ratio equal to one 12 inches/1 foot = 1
Multiply one unit by a conversion to obtain another unit w/o affecting magnitude

19. Drill: Convert:
2.50 cm to Mm
4.2 ns to ms
3.15 kg to mg

20. Determine the length in miles of a light year
Light year = distance light travels in one year
c = 3.0 x 108 m/s
1 mile = 5280 ft
1 inch = 2.54 cm

21. Convert: 4.35 kg/L to mg/mL 2.31 mm/ns to cm/Ms

22. Calculate the volume in m3 occupied by 750 kg of gas with 1
Calculate the volume in m3 occupied by 750 kg of gas with 1.50 g/L 1 cm3 = 1 mL

23. Calculate the mass in kg of a board that has dimensions of 250 mm x 4
Calculate the mass in kg of a board that has dimensions of 250 mm x 4.0 x 104 mm x 2.5 m and had a density of 0.80 g/mL 1 ml = 1 cm3

24. Calculate the density in g/mL of a 3. 14 x 103 kg cylinder that 5
Calculate the density in g/mL of a 3.14 x 103 kg cylinder that 5.0 m long & has a diameter of 2.0 m.

25. How many nm will
an object travel in
1/132 ks at
720 miles per hour 1 inch = 2.54 cm
1 mile = 5280 ft

26. Measurements
Work problems on page 23

27. Sig. Figs.
Work problems on page 23

28. Conv. Factors
Work problems 28 & 36 on page 24

29. Measurements
Work problems on page 25

30. Define all the key terms on page 24

31. Work problems on page 25

32. Conversion Factors
Work problems on page 25