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

Review Drill, Grade HW & Collect Both

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

Basic Units Length meters Mass kilograms Time seconds

Temperature Kelvin Amount Chm Mole Current Ampere Luminous In Candela

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

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

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

Precision How well one can repeat his or her work Repeatability

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

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

~ 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

Meaningful digits in a number Significant Digits Meaningful digits in a number

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

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

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

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

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

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

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

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

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

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

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.

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

Measurements Work problems 5 - 12 on page 23

Sig. Figs. Work problems 17 - 24 on page 23

Conv. Factors Work problems 28 & 36 on page 24

Measurements Work problems 5 - 12 on page 25

Define all the key terms on page 24

Work problems 13 - 16 on page 25

Conversion Factors Work problems 37 - 46 on page 25