Chemistry CP.

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Presentation transcript:

Chemistry CP

Metric System Scale in NB Multiple Big Small 1 Base Units (g,m,L) 1 2 3 4 0.1 Tenth Deci (d) 0.01 Hundredth Centi (c) 0.001 Thousandth Milli (m) 1000 Thousand Kilo (k) 100 Hundred Hecto (h) 10 Ten Deka (da) Division

Metric System Prefixes Metric Units Prefix Symbol 1,000,000,000,000 1012 tera T 1,000,000,000 109 giga G 1,000,000 106 mega M 1,000 103 kilo k 100 102 hecto h 10 deka da 0.1 10-1 deci d 0.01 10-2 centi c 0.001 10-3 milli m 0.000001 10-6 micro μ 0.000000001 10-9 nano n 0.000000000001 10-12 pico p 1 2 3 4

Metric System International System of Units (SI) Length – meter (m) Mass – gram (g) Volume – liter (L or l) Time – second (s) Temperature – Celsius (C) or Kelvin (K) Amount of substance – Mole (mol) Energy- Joule (J) 1 2 3 4

How Do “Measure” Chemistry? Metric System (International System of Units) Significant Figures Scientific Notation Dimensional Analysis We use these standards to compare measured quantities for accuracy.

Significant Figures Rules in NB Non-zero digits are always significant. 26.38= 4 SF 2. Any zeros between two significant digits are significant. (Captured Zeros) 406= 3 SF 91,600= 3 SF 3. A final zero or trailing zeros in the decimal portion ONLY are significant. 0.00500= 3 SF 0.03040= 4 SF We use these standards to compare measured quantities for accuracy.

Metric System Tools Mass (g): gram scale Length (m): Ruler and Meter Stick Volume (L): Graduated Cylinder

Metric Lab in NB Length Measurements (3 SF) Diameter Penny (cm) Height Lab Counter (cm) Width of Textbook (cm) Length of Room (m) Diameter of Penny Height of Lab Counter Width of Textbook Length of Room km m cm mm We use these standards to compare measured quantities for accuracy.

Metric Lab in NB 2. Mass Measurements (3 SF) Penny (g) Graduated cylinder with 10 mL of water(g) Empty graduated cylinder Mass of 10mL of water (g, calculated) Penny Graduated Cylinder with 10mL of Water Empty Graduated Cylinder Mass of 10mL of Water (Calculated) g cg mg kg We use these standards to compare measured quantities for accuracy.

Diameter of Double Stuff Metric Lab in NB 3. Oreo Measurements (3 SF) Cookie 1 Cookie 2 Average Mass of Regular g Diameter of Regular cm Height of Regular Mass of Double Stuff Diameter of Double Stuff Height of Double Stuff We use these standards to compare measured quantities for accuracy.

Homework Finish Metric Lab Data 8-25 Check Significant Figures! 3 Significant Figures ONLY! Quiz on 8-27 1 2 3 4