Balanced equation - 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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CHEM 120 Week 5 Exam 2 (Units 3 and 4)
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1.	A solution is prepared by dissolving 50 g of KCl (74.6 g/mol) to a volume of 1 L. What is the molarity of this solution? 
2.	You prepare a solution by dissolving 20 g of NaCl to a volume of 350 mL in water. What is the mass/volume % concentration of this solution? 
3.	When the following reaction goes in the forward direction, what is the base? 
4.	You are preparing a buffered solution. So far, your solution contains H2PO4- ions, what would you add to this solution to prepare your buffer sy...
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Chemistry 101 Final Ivy Tech Exam Questions with 100% Verified Correct Answers Graded A+
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Chemistry 101 Final Ivy Tech Exam Questions with 100% Verified Correct Answers Graded A+ 
Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: 
 
O2 + Mg ⟶ 2 MgO 
 
If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form? 
 
A. 8 Moles 
B. 2 Moles 
C. 4 Moles 
D. 1 Mole 
E. Not Enough Info - Correct Answer C 
 
Which of the following is TRUE? 
 
A. Stoichiometry allows predic...
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Chemistry 101 Final Ivy Tech Questions With Complete Solution
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Diatomic O2 can react with the element magnesium to form magnesium oxide (MgO). The balanced chemical equation is: 
 
O2 + Mg ⟶ 2 MgO 
 
If 4 moles of magnesium totally reacted with more than enough O2, how many moles of MgO would be expected to form? 
 
A. 8 Moles 
B. 2 Moles 
C. 4 Moles 
D. 1 Mole 
E. Not Enough Info correct answer: C 
 
Which of the following is TRUE? 
 
A. Stoichiometry allows prediction of how much of the reactants are necessary to form a given amount of product. 
 
B. ...
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Edexcel a level chemistry question paper 2 june 2023 + mark scheme
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Mark Scheme (Results) 
Summer 2023 
Pearson Edexcel GCE 
In Chemistry (9CH0) 
Paper 02: Advanced Organic and Physical 
ChemistryEdexcel and BTEC Qualifications 
Edexcel and BTEC qualifications come from Pearson, the world’s leading learning 
company. We provide a wide range of qualifications including academic, 
vocational, occupational and specific programmes for employers. For further 
information visit our qualifications websites at or 
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Alternatively, you can...
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Chem 101 Midterm Ivy Tech Questions And Answers
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What are the coefficient for the following reactions when it is properly 
balanced? 
___O2+___CH4----> CO2 + H2O 
~ 2,1,1,2 
Which of the following everyday substances does NOT typically contain an acid? 
~ Soap 
What type of reaction is the generic equation A+BC----> AC+B 
~ Single displacement 
A precipitate is excited to be formed when an aqueous solution of sodium 
sulfate is added to an aqueous solution of: 
~ Barium chloride 
Which of the following is NOT typically a sign of a...
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NCCER Level 4 exam 2023 with 100% correct answers
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Accounting - correct answer -The process of compiling and analyzing financial records is known as __ 
 
Equity - correct answer -Subtract a company's debt from its assets to determine its __ 
 
Assests = liabilities - correct answer -An equation that represents a balanced account for a business is __ 
 
Plumbers on the team - correct answer -Ensuring that the project is kept on schedule and within budget is a responsibility of the __ 
 
Critical path management - correct answer -The abbreviatio...
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Test Bank For Chemistry The Molecular Science 5th Edition by John W. Moore
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Chapter 3: Chemical Reactions 
1. Which of the following cannot be determined from a balanced chemical equation? 
a. b. c. d. e. 
ANSWER: POINTS: TOPICS: OTHER: 
The number of molecules of reactants and products. The number of atoms of each element reacting. 
The number of moles of reactants and products. The relative mass of each reactant and product. Whether the reaction will proceed as written. 
e 
1 
3.1 Chemical Equations Comprehension 
2. In the reaction given below, if 12 moles of aluminu...
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FINAL EXAM CHM 151 RIO SOLADO M.SCHAAB LATEST UPDATE GRADED A+
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FINAL EXAM CHM 151 RIO SOLADO 
M.SCHAAB LATEST UPDATE 
 
GRADED A+ 
 
What is the difference between an ionic bond and a covalent bond? 
 
 An ionic bond is formed when one atom transfers electrons to another atom, creating ions 
that attract each other. A covalent bond is formed when two atoms share electrons. 
 
How do you determine the number of valence electrons in an element? 
 The number of valence electrons can be determined by looking at the group number of the 
element in the periodic t...
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Sample Chemistry Placement Exam Questions with Certified Answers
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Sample Chemistry Placement Exam 
Questions with Certified Answers 
 
Answer: Oxygen 
Aluminum forms a +3 ion. In order for the formula unit Al2X3 to be electrically neutral, the 
element X must form a -2 ion. Nonmetals in the oxygen column do this. Of these elements, only 
oxygen is a diatomic gas. 
Aluminum reacts with element X to form a compound with the formula A2X3. Element X exists 
as diatomic molecules, X2, in the gaseous state at normal temperature and pressure. Element 
X must be? 
 
A...
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