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Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6 & 7) 50 Questions with Verified Answers,100% CORRECT $16.99
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Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6 & 7) 50 Questions with Verified Answers,100% CORRECT
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Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6 & 7) 50 Questions with Verified Answers 1. Which one of the following statements about balanced equations is TRUE? A reaction is balanced by A) multiplying by suitable coefficients B) changing the formula of the molecule C) cha...

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  • November 14, 2024
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Chem 111 General Chemistry 1 Practice Test #3 (Chapter 6
& 7) 50 Questions with Verified Answers

1. Which one of the following statements about balanced equations is TRUE? A
reaction is balanced by


A) multiplying by suitable coefficients
B) changing the formula of the molecule
C) changing the charge of an ion
D) rearranging atoms in a molecule - CORRECT ANSWER A) multiplying by suitable
coefficients

2. What is the stoichiometric coefficient for oxygen when the following equation
is balanced using the lowest, whole-number coefficients?

_____ C₃H₈O(l) + ____ O₂(g) → CO₂(g) + ____H₂O(l)


A) 7
B) 5
C) 9
D) 3 - CORRECT ANSWER C) 9

3. Given the chemical equation: N₂ + 3 H₂ → 2 NH₃. On a MICROSCOPIC level,
what do the coefficients mean?


A) 28g of nitrogen reacts with 6g of hydrogen to give 34g of ammonia

B) 1 atom of nitrogen reacts with 3 atoms of hydrogen to give 2 atoms of
ammonia

, C) 1 molecule of nitrogen reacts with 3 molecules of hydrogen to give 2 molecules
of ammonia

D) 1 mole of nitrogen reacts with 3 moles of hydrogen to give 2 moles of
ammonia - CORRECT ANSWER C) 1 molecule of nitrogen reacts with 3 molecules
of hydrogen to give 2 molecules of ammonia

4. Given the chemical equation: N₂ + 3 H₂ → 2 NH₃. On a MACROSCOPIC level,
what do the coefficients mean?


A) 1 molecule of nitrogen reacts with 3 molecules of hydrogen to give 2 molecules
of ammonia

B) 1 mole of nitrogen reacts with 3 moles of hydrogen to give 2 moles of ammonia

C) 1 atom of nitrogen reacts with 3 atoms of hydrogen to give 2 atoms of
ammonia

D) all of the above - CORRECT ANSWER B) 1 mole of nitrogen reacts with 3 moles
of hydrogen to give 2 moles of ammonia

5. 1.00 mole of O₂ contains the same number of molecules as:


A) 0.667 mole of O₃
B) 2.00 mole of CH₃CO₂OH
C) 1.00 mole of CH₃CO₂H
D) all of the above - CORRECT ANSWER C) 1.00 mole of CH₃CO₂H

6. What is the molar mass of aspartic acid, C₄O₄H₇N?


A) 197g/mol
B) 133g/mol
C) 70g/mol
D) 43g/mol - CORRECT ANSWER B) 133g/mol

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