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The Learning Goal for this assignment is: students will learn what properties are used to describe matter and how matter can change it's form. Notes Section: significant numbers you have to multiply or divide. in doing so you have round it to the nearest significant numbers Question Sig Figs Question Add & Subtract Question Multiple & Divide 1 4 1 55.36 1 20,000 2 4 2 84.2 2 94 3 3 3 115.4 3 300 4 3 4 0.8 4 7 5 4 5 245.53 5 62 6 3 6 34.5 6 0.005 7 3 7 74.0 7 4,000 8 2 8 53.287 8 3,900,000 9 2 9 54.876 9 2 10 2 10 40.19 10 30,000,000 11 3 11 7.7 11 1,200 12 2 12 67.170 12 0.2 13 3 13 81.0 13 0.87 14 4 14 73.290 14 0.049 15 4 15 29.789 15 2,000 16 3 16 39.53 16 0.5 17 4 17 70.58 17 1.9 18 2 18 86.6 18 0.05 19 2 19 64.990 19 230 20 1 20 36.0 20 460,000
Significant Figures Rules There are three rules on determining how many significant figures are in a number: 1. Non-zero digits are always significant. 2. Any zeros between two significant digits are significant. 3. A final zero or trailing zeros in the DECIMAL PORTION ONLY are significant. Please remember that, in science, all numbers are based upon measurements (except for a very few that are defined). Since all measurements are uncertain, we must only use those numbers that are meaningful. Not all of the digits have meaning (significance) and, therefore, should not be written down. In science, only the numbers that have significance (derived from measurement) are written. Rule 1: Non-zero digits are always significant. If you measure something and the device you use (ruler, thermometer, triple-beam, balance, etc.) returns a number to you, then you have made a measurement decision and that ACT of measuring gives significance to that particular numeral (or digit) in the overall value you obtain. Hence a number like 46.78 would have four significant figures and 3.94 would have three. Rule 2: Any zeros between two significant digits are significant. Suppose you had a number like 409. By the first rule, the 4 and the 9 are significant. However, to make a measurement decision on the 4 (in the hundred's place) and the 9 (in the one's place), you HAD to have made a decision on the ten's place. The measurement scale for this number would have hundreds, tens, and ones marked. Like the following example: These are sometimes called "captured zeros." If a number has a decimal at the end (after the one’s place) then all digits (numbers) are significant and will be counted. In the following example the zeros are significant digits and highlighted in blue. 960. 70050. 21
Page 2 and 3: Honors Chemistry Class Policies and
Page 4 and 5: Unit 1 (22 days) Chapter 1 Introduc
Page 6 and 7: Lorenzo Walker Technical High Schoo
Page 8 and 9: MUSTANG LABORATORIES COMMITMENT TO
Page 10 and 11: Chapter 1 Unit 1 Introduction to Ch
Page 12 and 13: K H D B D C M KING HENRY DIED DRINK
Page 14 and 15: 2. One cereal bar has a mass of 37
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Page 18 and 19: The Learning Goal for this assignme
Page 20 and 21: RULE #3: To add/subtract in scienti
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Page 30 and 31: Chapter 4 Unit 2 Atomic Structure T
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Page 36 and 37: Neutron Madness We have already lea
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Page 50 and 51: Define Electronegativity: Electrone
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Trigonal Pyramidal Molecular Geomet
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Trigonal Bi pyramidal Molecular Geo
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Octahedral Molecular Geometry Orbit
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Orbitals Equation Lone Pairs Angle
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Chapter 9 Unit 4 Chemical Names and
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http://www.bbc.co.uk/education/guid
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Unit 5 Chapter 10 Chemical Quantiti
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www.youtube.com/watch?v=AsqEkF7hcII
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Categories of Reactions All chemica
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List what type the following reacti
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How to Balance Chemical Equations A
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Step 5 Balance the hydrogen atoms n
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6) ___ 1 Mn(NO2)2 + ___ 1 BeCl2 __
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The Learning Goal for this assignme
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Stoichiometry and Balanced Equation
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Step 1: 200g C3H8 is equal to 4.54
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Stoichiometry and balanced equation
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%yield = 6.1 tons × 100 = 64% 9.6t
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Use the space provided to write out
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Unit 6 Chapter 13 States of Matter
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Allotropes are consisted of atoms o
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temperature average kinetic energy
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keep the pressure constant heat up
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direct relationship so divide tempe
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kelvin equals everything stops K= t
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Unit 7 Chapter 16 Solutions The stu
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Part 5: Molarity Molarity (M) is th
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The Time-Temperature Graph We are g
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Step Two: solid ice melts Now, we c
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Step Four: liquid water boils Now,
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The following table summarizes the
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The Learning Goal for this section
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moving from one side to another, an
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- An enhancer is “a DNA sequence
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Unit 8 Chapter 19 Acid and Bases Th
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The Learning Goal for this section
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This would be a generic base: XOH -
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HCl + H2O ⇌ H3O + + Cl¯ HCl - th
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Several categories of substances ca
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1. 2.82 2. 8.30 3. 0.00 4. 3.485 5.
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2. What is the oxidation number of
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One point of concern: notice that e
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Reference Tables for Physical Setti
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150. 140. Table G Solubility Curves
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Table I Heats of Reaction at 101.3
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Table O Symbols Used in Nuclear Che
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0 6.941 +1 Li 3 2-1 Na 39.0983 K +1
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First Atomic Symbol Name Ionization
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Collier County CHEMISTRY EXAM FORMU
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CHEMISTRY EXAM FORMULA AND RESOURCE
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