Showing posts with label Chemistry. Show all posts
Showing posts with label Chemistry. Show all posts

## Wednesday, July 1, 2020

### Scientific Notation and Significant Figures Worksheet 3

 Scientific Notation/Significant FiguresWorksheet 3

1. Give the number of significant figures in each of the  following.

a)  10.0005 g   ______
b)  0.003423 mm  ______
c)  2900 + 100 ft  ______
d)  8.9 x 105 L  ______
e)  the number of minutes (60) that make up an hour         ______

2. Determine the answer for each of the following.  Be sure to  use the correct number of significant figures.

a)   27.34                                                         b)    2.8023
6.90                                                             -  4.762
+  13.124

c)  0.32 x 14.50 x 120 =                                   d)  24.1 / 0.005  =

3. Round each of the following to 3 significant figures.
707.5  ____________                                 2,300.2  ______________

0.0003350   _____________                      10.26730   _______________

18.95 x 1021   ______________

4. Convert each of the following into correct scientific  notation.
1747    _________________________________
0.00000984     ___________________________
3200.0 x 102  ____________________________
0.002014 x 102  __________________________
25600000000000000  ______________________  (use 4 sig. fig. for the last one only)

5. Calculate the following using the correct number of significant figures.
a)  2.34 x 1047                   b)  9132.0
+ 9.2 x 1046                           -    1.6 x 103

6. Calculate the following using the correct number of significant figures.
a)  (1.54 x 1058)(3.5 x 1060)
b)  (7.9 x 1034) / (8.32 x 1023)

1. Give the number of significant figures in each of the  following.
a)  10.0005 g     6
b)  0.003423 mm    4
c)  2900 + 100 ft     2
d)  8.9 x 105 L     2
e)  the number of minutes (60) that make up an hour        infinite
2. Determine the answer for each of the following.  Be sure to  use the correct number of significant figures.

a)  47.36                                       b)    -1.960
c)  5.6 x 102                                  d)   5 x 103
3. Round each of the following to 3 significant figures.
708                                2.30 x 103

0.000335                      10.3

19.0 x 1021
4. Convert each of the following into correct scientific  notation.
1.747  x 103
9.84  x 10-6
3.2000 x 105
2.014 x 10-1
2.560 x 1016
5. Calculate the following using the correct number of significant figures.
a)  3.26 x 1047                   b)  7.5 x 103
6. Calculate the following using the correct number of significant figures.
a)  5.4 x 10118
b)  9.5 x 1010

### Scientific Notation and Significant Figures Worksheet 2

 Scientific Notation/Significant FiguresWorksheet 2

1. Convert each of the following into scientific notation.
727    _________________________________
172000      _________________________________
0.000984       _________________________________
200.0 x 102    _________________________________
0.014 x 102    _________________________________
2560000000000000000000000000000000  __________________________
(use 4 sig. fig. for the last one)

2. Convert each into decimal form.
1.56 x 104  _________________________________
3.6 x 10-2  _________________________________
736.9 x 105  _________________________________
0.0059 x 105  _________________________________
0.00059 x 10-1  _________________________________

3. Calculate the following.  Give the answer in correct scientific notation.
a)  2.34 x 1065                   b)  313.0
+ 9.2 x 1066                         -    1.2 x 103

4. Calculate the following.  Give the answer in correct scientific notation.
a) 8.95 x 1076/ 1.25 x 1056          b)  (4.5 x 1029)(2.45 x 10100)

5. Give the number of significant figures in each of the  following.
a)  1.05 g   ______
b)  0.0003040 mm  ______
c)  29000 + 10 ft  ______
d)  0.90 x 1045 L  ______
e)  the number of eggs (12) that make up a dozen    ______

6. Determine the answer for each of the following.  Be sure to  use the correct number of significant figures.
a)   17.34                                                             b)     9.80
4.900                                                                -  4.762
+  23.1

c)  3.9 x 6.05 x 420 =                                           d)  14.1 / 5  =

7. Round each of the following to 3 significant figures.
77.0653  ____________     6,300,178.2  ______________

0.00023350   _____________      10.2030   _______________

2.895 x 1021   ______________

1. Convert each of the following into scientific notation.
7.27 x 102
1.72000 x 105
9.84 x 10-4
2.000 x 104
1.4
2.560 x 1033
2. Convert each into decimal form.
15600 + 100
0.036
73690000 + 10000
590 + 10
0.000059
3. Calculate the following.  Give the answer in correct scientific notation.
a)   9.434 x 1066                  b)  - 8.87 x 102
4. Calculate the following.  Give the answer in correct scientific notation.
a) 7.16 x 1020          b) 1.1025 x 10130
5. Give the number of significant figures in each of the  following.
a)  1.05 g      3
b)  0.0003040 mm     4
c)  29000 + 10 ft     4
d)  0.90 x 1045 L    2
e)  the number of eggs (12) that make up a dozen  infinite
6. Determine the answer for each of the following.  Be sure to  use the correct number of significant figures.
a)   45.3                                                             b)  5.04
c)  9.9 x 103                                                      d)  3
7. Round each of the following to 3 significant figures.

 77.1 6.30 x 106 0.000234 10.2 2.90 x 1021

### Scientific Notation and Significant Figures Worksheet 1 with Answer keys

Scientific Notation/Significant Figures
 Worksheet 1

1. Convert each of the following into scientific notation.
 a) 3427 b) 0.00456 c) 123,453 d) 172 e) 0.000984 f) 0.502 g) 3100.0 x 102 h) 0.0114 x 104 i) 107.2 j) 0.0000455 k) 2205.2 l) 30.0 x 10-2 m) 0.982 x 10-3 n) 0.0473 o) 650.502 p) 3.03 x 10-1 q) 20.4 x 105 r) 1.29 s) 0.00565 t) 1362205.2 u) 450.0 x 103 v) 1000 x 10-3

2. Determine the number of significant figures in each of the following:

 a) 3427 b) 0.00456 c) 123,453 d) 172 e) 0.000984 f) 0.502 g) 3100.0 x 102 h) 0.0114 x 104 i) 107.2 j) 0.0000455 k) 2205.2 l) 30.0 x 10-2 m) 0.982 x 10-3 n) 0.0473 o) 650.502 p) 3.03 x 10-1 q) 20.4 x 105 r) 1.29 s) 0.00565 t) 1362205.2 u) 450.0 x 103 v) 1000 x 10-3 w) 546,000 + 10 x) 546,000 + 1000

3. Convert each into decimal form.

 1.56 x 104 0.56 x 10-2 3.69 x 10-2 736.9 x 105 0.00259 x 105 0.000459 x 10-1 13.69 x 10-2 6.9 x 104 0.00259 x 103 0.0209 x 10-3

4. Calculate the following.  Give the answer in correct scientific notation.

a)  4.53 x 105                            b)  1913.0
+ 2.2 x 106                                    -    4.6 x 103

c)  2.34 x 1024                           d)    2.130 x 103
+ 1.92 x 1023                               -  6.6 x 102

e)  9.10 x 103                             f)    1113.0
+ 2.2 x 106                                    -    14.6 x 102

g)  6.18 x 10-45                           h)    4.25 x 10-3
+ 4.72 x 10-44                               -  1.6 x 10-2

5. Calculate the following.  Give the answer in correct scientific notation.

a) 3.95 x 102/1.5 x 106                   b)  (3.5 x 102)(6.45 x 1010)

c) 4.44 x 107 /2.25 x 105                 d)  (4.50 x 10-12)(3.67 x 10-12)

e) 1.05 x 10-26 /  4.2 x 1056             f)  (2.5 x 109)(6.45 x 104)

g) 6.022 x 1023 / 3.011 x 10-56      h)  (6.88 x 102)(3.45 x 10-10)

Left increase, right decrease

1. Convert each of the following into scientific notation.

 a) 3.427 x 103 b) 4.56 x 10-3 c) 1.23453 x 105 d) 1.72 x 102 e) 9.84 x 10-4 f) 5.02 x 10-1 g) 3.1000 x 105 h) 1.14 x 102 i) 1.072 x 102 j) 4.55 x 10-5 k) 2.2052 x 103 l) 3.00 x 10-1 m) 9.82 x 10-4 n) 4.73 x 10-2 o) 6.50502 x 102 p) 3.03 x 10-1 q) 2.04 x 106 r) 1.29 x 100 = 1.29 s) 5.65  x 10-3 t) 1.3622052 x 106 u) 4.500 x 105 v) 1.000 x 100 = 1.000
2. Determine the number of significant figures in each of the following:

 a) 4 b) 3 c) 6 d) 3 e) 3 f) 3 g) 5 h) 3 i) 4 j) 3 k) 5 l) 3 m) 3 n) 3 o) 6 p) 3 q) 3 r) 3 s) 3 t) 8 u) 4 v) 4 w) 5 x) 3
3. Convert each into decimal form.

 15600 + 100 0.0056 0.0369 73690000 + 10000 259 4.59e-05 0.1369 69000 + 1000 2.59 2.09e-05
4. Calculate the following.  Give the answer in correct scientific notation.

 a)  2.7 x 106 b)  -2.7 x 103 c)  2.53 x 1024 d)  1.47 x 103 e)  2.2 x 106 f)  -3.5 x 102 g)  5.34 x 10-44 h) -1.2 x 10-2
5. Calculate the following.  Give the answer in correct scientific notation.

 a) 2.63 x 10-4 b) 2.3 x 1013 c) 1.97 x 102 d) 1.65 x 10-23 e) 2.5 x 10-83 f) 1.6 x 1014 g) 2.000 x 1079 h) 2.37 x 10-7

## Thursday, December 11, 2014

### THINGS THAT YOU NEED TO KNOW FOR THE FINAL - HS Chemistry Final

THINGS THAT YOU NEED TO KNOW FOR THE FINAL
-       Students can use the periodic table, a 5-8 “cheat sheet”, a scientific calculator, and the ion sheet on the final exam.
-       There will be about 150 multiple choice questions.
-       Your final grade will be posted by Friday of the final week.

Chapter 1 –  INTRODUCTION TO CHEMISTRY
a.     What is chemistry? 5 branches of chemistry.   Scientific law and the scientific method.  Law of conservation of mass, etc.
b.     Know all of terminologies for chapter one; Distinguish between pure and applied chemistry; and why study chemistry.

#### Suggested problems: #34-64 even pg 35-37and whole page 37

Chapter 2 – MATTER AND CHANGE
c.     All terminologies, different states and properties of matter.
d.     Distinguish between substance and mixture (figure 2.11)
e.     Identify chemical reaction, chemical and physical changes
Suggested problems: page58-59 # 33-69 odds

Chapter 3:  SCIENTIFIC MEASUREMENT
a.     Learn all terminologies and SI units system.
b.     Conversion factor and Dimensional Analysis
c.     Converting between units both simple and multi-step problems
d.     Know rules for significant figures and scientific notation, etc
e.     Conversion between temperature and other units, calculate density.
Suggested problems: pages 87-96,  #38 to 70 evens

Chapter 4: Atomic Structure
a.     Know who discover protons, electrons, neutrons
b.     How to write atomic structure and its calculations:  Atomic #, Atomic mass, etc
c.     Isotopes of Element and calculating the atomic mass of an element
Suggested problems: pages 122-123 # 34 to 56 even.

Chapter 5:  Electrons in Atoms
a.     Know the  development of Atomic models and all key terms
b.     Know to write electron configuration, Lewis dot structure and draw orbital diagrams.
c.     Know the physics and the quantum mechanical model; electromagnetic radiation; and calculate the frequency, wavelength, and energy.
Suggested problems: pages 149-150 # 23 to 47 odds and # 57-61 page 150.

Chapter 6:  The Periodic Table
Everything about it; trends, patterns, location, names of groups/family.
Suggested problems: the first 30 problems of each chapter.

Chapter 7 and 8:  CHEMICAL BONDING
Everything you need to know about bonding from metallic to non-polar covalent bonding.   Suggested problems: the first 30 problems of each chapter.

Chapter 9: CHEMCIAL NAMES AND FORMULAS
a.     Know the periodic table well
b.     Know how to write and name element, ions, compounds
c.     Must know how to write chemical formulas properly
d.     Know the laws of definite and multiple proportions
Suggested problems: practice concepts 1-20 and page 136-138 # 33 to 51 odds.

Chapter 10 – Chemical Quantity

### 1.     Know how to calculate molar mass.

1. Find the % composition of an element in a compound.
2. Conversions between mass, moles, and molecules of the same compound.

Suggested problems – the first 30 questions in the chapter.

## Monday, September 10, 2012

### Mr. Bach's Chemistry Course Outline and Syllabus

 CP Chemistry Prerequisite – IM 2 or higher Graduation – Fulfill one year of physical science requirement Duration - 2 semesters Credit – 5 units per semester with “D-” or better for high school. “C-” for UC/CSU. 10 credits – 9th - 12th grade A-G approved science course for UC 1 year laboratory science “d”

Chemistry Course Outline and Syllabus
Science Department - Mira Loma High School
Teacher: Phe Bach, Ed.D.
Email: pbach@sanjuan.edu; Room: H-207

MLHS Vision/Mission Statement:
Embracing diversity and valuing excellence, Mira Loma High School's mission is to inspire and educate each student toward academic achievement, critical thinking, intrinsic success, and responsible contributions to a peaceful international society by providing innovative, rigorous, student-focused instruction through a rich tradition of high-quality programs and dynamic activities in a safe, compassionate, and collaborative learning community.

Course Goals:
- Achieving the defined California State Standards for High School Chemistry.
- Fulfilling the requirements of IB Middle Years Programs.
- Preparing students for college and presenting chemistry material that applies to their daily life with a positive attitude.

Organization/Course Standards: This course is followed closely the Prentice Hall Chemistry textbook.  It is organized into ten units according to California State and SJUSD’s Standards for chemistry.  Students will understand the following topics:

Unit 1 – Introduction to the Methods of Chemistry:
Measurements and Calculations; Lab Equipment and Lab Safety
Unit 2 – Matter and Changes / Scientific Measurement:
Matter, elements and compounds, mixtures, chemical reactions. Measurements and their uncertainty, Basic SI systems, Density.
Unit 3 – Atomic Structure, Electrons and Periodic Behavior
Atoms – The building blocks of Matter; Structure of the atoms; arrangement of Electrons in Atoms, the Periodic Law, Periodic Trends
Unit 4 –Chemical Bonding and Molecular Structure:
Chemical bonding; Structure of Covalent Molecules, Salts, and Metals
Unit 5 – Chemical Names and Formula/Conservation of Matter:
Chemical Formulas and Compounds, Chemical Equations and Reactions.
Unit 6 – Stoichiometry
The arithmetic of equations, chemical calculations, limiting reagent and percent yield.
Unit 7 – Gas Laws / Gas Behavior:
Physical Characteristics of Gases, Gas Laws, Molecular Composition of Gases
Unit 8 – Solids, Liquids and Solutions / Acids and Bases:
Liquids and Solids, Properties of Solutions and Solution Concentration, Acids and Bases, Characteristics of Acids and Bases, Titration, calculating pH, neutralization of acids and bases.
Unit 9 – Electrochemistry, Thermochemistry and/or Nuclear Chemistry
Electrochemical cells, reduction-oxidation reactions; The flow of energy, heat in changes of states, nuclear radiation, nuclear transformations, Fission/Fusion of Atomic nuclei.
Unit 10 – Introduction to Organic and Biochemistry.
Subjects outside of the State Standards, covered after the Content Standards Test in early May.
a.     Classwork/Homework, standards testing, presentations 20%
b.    Portfolio, Quizzes, and Unit Tests 25%
c.     Laboratory notebook, lab quizzes, project and lab reports 25%
d.     Comprehensive final exam 15%
e.   Participation and attendance 15%

100% - 90% = A || 90% - 80% = B || 80% - 70% = C || 70% - 60% = D || Below 59.9% = F
I’ll use the normal grade scale with “plus” and “minus”.
I’ll not curve my tests, but I DO give extra credits.

Extra Credits:
You made earn up to 1.0% per semester. Bonus points are awarded from time to time at the instructor’s discretion for a variety of little extra reasons such as bring materials for the lab, writing summary of science/chemistry articles, asking brilliant questions and seeking the answer, helping out the room/lab, etc… or conducting an original research or writing an exceptional research paper and this work is no “Mickey Mouse” project. Ask the instructor for more information.

Besides HONESTY and PERSONAL INTEGRITY, RESPECT is the key. Being courteous, mindful and respectful to fellow students, T.A., substitute, your instructor, and our classroom settings are expected at all times. Unnecessary acting out, put down, talking, trashing class/campus, or other immature behaviors will lead to lowering of your citizenship grade. Finally, the citizenship grading policy will comply with Mira Loma and San Juan School Districts’ policies. This includes adhering to all rules in our handbook. For example, after 3 tardies (<30mins) results in parent-called plus 1-hour detention and after each truancy (>30mins) will results in lower 1 citizenship grade.

The following criteria will be used to determine the citizenship grade:
A: Student is attentive, stays on task, complies with teacher requests, is
courteous to others, treats equipment well, contributes positively to the
class learning environment, follows class rules and is on time to class.
B: Student demonstrates occasional transgressions of the expectations listed for an A, but makes an effort not to repeat them.
C: Student demonstrates occasional transgressions of the expectations listed for the “B” student and may be inattentive, off task, unprepared or occasionally tardy and may require reminders to remain on task.
D: Student is disruptive to the class and learning environment and makes little effort to correct his/her behavior even after disciplinary actions are taken.  He/she may exhibit unacceptable or rude interpersonal behavior and may accumulate many tardies during the grading period.
F: Student persistently disrupts the classroom learning environment, fails to respect individual rights and property or school responsibilities along with possibly being chronically tardy to class.

NOTE: A major infraction of these rules may result in a more dramatic drop in the citizenship grade after conferencing with the student, legal guardian and/or administrator. Issues with academic malpractice will also negatively affect the student’s citizenship grade.

Electronic Devices:     MUST BE TURNED OFF AND STORED OUT OF SIGHT WHILE STUDENTS ARE INSIDE THE CLASSROOM.
Electronic devices may be used before school, after school, during passing periods, break, and lunch. The school is not responsible for any lost or stolen items.  Students will receive progressive discipline for using their cell phone during class (1st warning, 2nd phone taken away/‘phone jail’, 3rd detention/referral). Phone sleeves will be used during quizzes and tests.
At any time during the school year the privilege to use electronic devices during school hours may be revoked by school administration (phone lockers in the VP office).

Passes:        Please use the restroom at lunch, passing periods, or before school, however, if you need to use the restroom, just raise your hand without interrupting the class.  If this becomes a frequent occurrence, I will be forced to have a (remarkably awkward) conversation with you and your parents about the obvious medical issue you have.  Per school rules, students are not allowed to use the restroom the first and last ten minutes of class.  A forgetful mind is not an emergency, make sure all of your possessions are with you and not in the quad, or in you car, or in your last classroom, or . . .

Each student is responsible for performing academic tasks in such a way that honesty is not in question.  Plagiarism is a serious violation of academic honesty, and students are expected to maintain the following standards of integrity:  All tests, term papers, oral or written assignments, projects and recitations are to be the work of the student presenting the material.  Any use of wording, ideas, or findings of other persons, writers, or researchers requires the explicit citation of the source; use of the exact wording requires a “quotation” format and citation (MLA format). Any student deliberately assisting another student in academic dishonesty is also culpable.  (i.e.  Letting a friend copy your homework, sharing test questions or answers, providing a photo of tests or quizzes)  Students found in violation of the academic integrity policy will be subject to school discipline which may include, loss of, or zero credit on the assignment, lowered citizenship grade in the course, parent conference, and Saturday School.  Teacher, counselor, or student may request restorative practices.

MAKE UP POLICY:
When you are absent, it is your responsibility to turn in work that was due during your absence the following day you’re back. If you missed a lab/test, it must make up within ONE week or it will results in a zero. Late works will NOT be accepted unless it is an excused absence. Homework are turn in every Wednesday and Friday. Late work is no longer accepted. All grade discrepancy must take care of within one week of posted grade.
Contact:         I am almost always available during lunch (except when participating in intramural sports) and you may catch me during break, before or after school. To ensure you catch either of us, a quick email to set up an appointment is useful.  The best way for you and your parents to reach us is through E-mail: pbach@sanjuan.edu. Students can also use Google Classroom (which goes to our email anyway). If needed, we will message students using Google Classroom so please ensure you have set up a method to see those messages (historically, students have found the app is VERY helpful for this).

Code of Conduct: Classroom policies, policies on attendance, tardiness, dress code, and behavior, are addressed in the student handbook, will be implemented along with district policies (Please see below)

Mr. BACH’S FIVE STUDYING AND LIVING PRINCIPLES
Or CODE OF CONDUCT

Classroom policies, policies on attendance, tardiness, dress code, electronic devices and behavior are addressed in the student handbook. They will be implemented along with district policies.  Students cannot use electronic devices at any given time in the classroom. Exceptions will be allowed during class activities such as Kahoot, Google classroom, researching, and so on.

FIVE STUDYING AND LIVING PRINCIPLES
Mr. Bach will also implement these Five Studying/Living Principles in our classroom. It is a mindful way of living and we will practice reflective and mindfulness, as it is the key to peace and harmony with oneself in the classroom, in the family and ultimately in the world.

1. Do no harm. (Non-harming) – Abstain from intentionally hurting or killing any animate life.  Do not harass or bully anyone or other beings physically, mentally or emotionally. For example, if you see spiders or other insects in the classroom please take them outside or let me know and I will do it. In Mr. Bach’s classroom remember this wise saying: think no evil; speak no evil; act no evil, text no evil, post no evil and comment no evil.

2. Have integrity. (Honesty) – Don’t take anything that does not belong to you without permission, including intellectual property. This means that you should avoid plagiarism, copying, or taking materials such as chemicals from the lab. Only take what is offered. Practice self-discipline and show self-esteem.

3. Respect yourself and others. (Respect) – Respect all others, including different living organisms, fellow classmates, other teachers, substitute teachers, and so on. Show courtesy and politeness. Being respectful starts with the Golden Rules. Be considerate of other people's feelings. Show manners, etiquette and sincere intention as it is a way to keep society in harmony. Respect the classroom space and property. Being respectful also means don't discriminate and being open-minded.

4. Communicate responsibly. (Communication) – Let’s put ourselves in each other’s shoes. Be mindful of your communication, including what you think, say and do. Please be responsive rather than reactive- think of a win-win situation. Please listen attentively; use deep listening skills and loving speech.

5. Show kindness and compassion. (Compassion)  Show empathy and sympathy. Be kind, warm-hearted and caring to yourself and others around you. However, before you can show kindness, love or compassion for others, you must first practice self-kindness, self-love and self-compassion for yourself and family. In order to make our surroundings more kind, loving and compassionate, we have to be an agent of change. Happiness, love, kindness, and compassion start from the within.

Resources:

1. Good website to learn: www.sciencegeek.net