Empirical formula - Study guides, Class notes & Summaries
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Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update)
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Chem 103 Module 1 to 6 Exam with Verified answers (100 OUT OF 100) Portage learning (Latest Update) 
 
 
MODULE 1 EXAM 
Question 1	 Click this link to access the Periodic Table. This may be helpful throughout the exam. 
1.	Convert 845.3 to exponential form and explain your answer. 
2.	Convert 3.21 x 10-5 to ordinary form and explain your answer. 
 
 
1.	Convert 845.3 = larger than 1 = positive exponent, move decimal 2 places 
= 8.453 x 102 
2.	Convert 3.21 x 10-5 = negative exponent = smalle...
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Rio Salado CHM 130 Midterm Objectives with Complete Solutions
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Rio Salado CHM 130 Midterm Objectives 
 
with Complete Solutions 
 
What is the definition of an element in chemistry? 
 An element is a pure substance consisting of only one type of atom. 
 
How is a compound different from a mixture? 
 A compound is a substance composed of two or more different elements chemically 
combined, while a mixture is a combination of two or more substances that are not chemically 
bonded. 
 
What does the term “molarity” refer to in chemistry? 
 Molarity refers t...
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CHM151 Rio Salado Midterm Questions and Answers 100% Pass
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CHM151 Rio Salado Midterm Questions 
 
and Answers 100% Pass 
 
What is the definition of an element in chemistry? 
 An element is a substance that cannot be broken down into simpler substances by chemical 
means and consists of only one type of atom. 
 
How do you determine the number of protons in an atom? 
 The number of protons in an atom is equal to the atomic number of the element. 
 
What is the primary difference between an ionic bond and a covalent bond? 
 An ionic bond is formed by the...
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AQA AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper + Mark scheme [MERGED] June 2022 *JUN227404201* IB/M/Jun22/E7 7404/2 For Examiner’s Use Question Mark 1
- Exam (elaborations) • 63 pages • 2023
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AQA 
AS 
CHEMISTRY 
7404/2 
Paper 2 Organic and Physical Chemistry 
Question Paper + Mark scheme [MERGED] 
June 2022 
*JUN* 
IB/M/Jun22/E7 7404/2 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
7 
Section B 
TOTAL 
Time allowed: 1 hour 30 minutes 
Materials 
For this paper you must have: 
• the Periodic Table/Data Sheet, provided as an insert (enclosed) 
• a ruler with millimetre measurements 
• a scientific calculator, which you are expected to use where appropriate. 
Instructions...
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OCR 2023 Chemistry A H032/01: Breadth in chemistry AS Level Question Paper & Mark Scheme (Merged)
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2 
OCR 2023 
SECTION A 
You should spend a maximum of 25 minutes on this section. 
Write your answer to each question in the box provided. 
1 Which statement explains the trend in boiling points down the halogens group? 
A Covalent bonds become stronger. 
B Induced dipole–dipole interactions (London forces) become stronger. 
C Ionic bonds become stronger. 
D Permanent dipole–dipole interactions become stronger. 
Your answer [1] 
2 A hydrocarbon contains 85.71% carbon by mass. 
What is the em...
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STRAIGHTERLINE CHEMISTRY FINAL EXAM TEST WITH COMPLETE SOLUTIONS
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What is the term used for findings that are summarized based on a pattern or trend? 
a. Law 
b. Hypothesis 
c. Theory 
d. Phenomena 
e. Prediction - a. Law 
Which of the following is a tentative explanation for a set of observations? 
Select one: 
a. Law 
b. Hypothesis 
c. Theory 
d. Phenomena 
e. Prediction - b. Hypothesis 
If a liquid contains 60% sugar and 40% water throughout its composition then what is it 
called? 
Select one: 
a. Solute 
b. Compound 
c. Homogeneous mixture 
d. Heterog...
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Straighterline Chemistry Final Exam (ACTUAL) 2023/2024 Questions and Answers
- Exam (elaborations) • 46 pages • 2023
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Straighterline Chemistry Final Exam (ACTUAL) 
 
What is the term used for findings that are summarized based on a pattern or trend? 
a.	Law 
b.	Hypothesis 
c.	Theory 
d.	Phenomena 
e.	Prediction - Answer a. Law 
 
Which of the following is a tentative explanation for a set of observations? Select one: a. Law 
b.	Hypothesis 
c.	Theory 
d.	Phenomena 
e.	Prediction - Answer b. Hypothesis 
 
If a liquid contains 60% sugar and 40% water throughout its composition then what is it calle...
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Straighterline Chemistry Final Exam Questions with Complete Solutions Latest
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Straighterline Chemistry Final Exam Questions with Complete Solutions Latest 
 
 
The 80Br- ion has 
 
Select one: 
a. 45 protons, 35 neutrons, 45 electrons. 
b. 35 protons, 45 neutrons, 34 electrons. 
c. 35 protons, 45 neutrons, 36 electrons. 
d. 45 protons, 35 neutrons, 46 electrons. 
e. 35 protons, 45 neutrons, 46 electrons. - Answer-e. 35 protons, 45 neutrons, 46 electrons. 
 
The formula for sodium sulfide is 
Select one: 
a. NaS 
b. K2S 
c. NaS2 
d. Na2S 
e. SeS - Answer-d. Na2S 
 
Which...
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SNCOA Advanced Course 2-20 Critical Thinking exam with 100% correct answers (latest update)
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Opinion 
a belief held from a personal point of 
view 
 
based on individual experience 
 
applied to future expected circumstances 
 
truisms become assumptions 
 
 
 
Rationality 
excludes emotion, requires evidence and proof, and disregards self-interests, bias, prejudices, and wishful desires 
 
open-minded 
 
 
 
Rationalization 
negative 
 
already decided on conclusion 
 
 
 
Reasoning 
opposite of rationalization 
 
consider related statements to draw a conclusion 
 
deliberate function ...
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Test Bank for Chemistry: The Molecular Nature of Matter, 8th Edition by Jespersen
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Test Bank for Chemistry: The Molecular Nature of Matter, 8th Edition 8e by Neil D. Jespersen, Alison Hyslop. Full Chapters test bank are included with answers - Chapter 1 to 22 included 
 
0 A Very Brief History of Chemistry 1 
 
0.1 Chemistry’s Important Concepts 2 
 
0.2 Supernovas and the Elements 3 
 
0.3 Elements and the Earth 5 
 
0.4 Dalton’s Atomic Theory 7 
 
0.5 Internal Structure of the Atom 8 
 
Tools for Problem Solving 20 
 
Review Questions and Problems 21 
 
1 Scientific Meas...
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