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CHEM 120 WEEK 8 FINAL EXAM LATEST VERSION ACTUAL EXAM 140 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+$27.99
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CHEM 120 WEEK 8 FINAL EXAM LATEST VERSION ACTUAL EXAM 140 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+
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Course
CHEM 120
Institution
CHEM 120
CHEM 120 WEEK 8 FINAL EXAM LATEST VERSION
ACTUAL EXAM 140 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
CHEM 120 WEEK 8 FINAL EXAM LATEST VERSION
ACTUAL EXAM 140 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |AL...
CHEM 120 WEEK 8 FINAL EXAM LATEST VERSION
2023-2024 ACTUAL EXAM 140 QUESTIONS AND
CORRECT DETAILED ANSWERS WITH RATIONALES
(VERIFIED ANSWERS) |ALREADY GRADED A+
Elements in groups IA and VIIA of the periodic table possess, respectively, how many valence elecetrons
- 1 and 1
- 1 and 7
- 7 and 1
- 8 and 8 - ANSWER-1 and 7
How many total electrons are present in a N^3- ion - ANSWER-10
Which of the following ions is not isoelectronic with the noble gas neon?
- Na1+
- F1-
- C4+
- N3- - ANSWER-C4+
The correct name for the ionic compond Fe2Se3 is
- iron selenide
- iron (III) selenide
- iron triselenide
- diiron triselenide - ANSWER-Iron (III) selenide
Which of the following statements about polyatomic ions is correct?
- All must have names which end in -ate
- All must contain one of the halogens
- Negative ions are more common than positive ions
,- All carry a charge of two - ANSWER-Negative ions are more common than positive ions
In which of the following pairs of ionic compounds do both members of the pair contain +1 ions
- KCl and CaO
- Na3N and Li2S
- AlCl3 and MgF2
- more than one correct response
- no correct responcse - ANSWER-Na3N and Li2S
For the electron configuration 1s2, 2s2, 2p6, 3s2, 3p5, choose the appropriate number of valence
electrons present from the response list - ANSWER-7 valence e
In which of the following pairs of polyatomic ions do both members of the pair have the same charge?
- sulfate and phosphate
- carbonate and hydroxide
- ammonium and nitrate
- more than one correct response
- no correct response - ANSWER-no correct response
Which of the following molecular compounds would have a Lewis structure that contains 10 electron
dots
- HCN
- H2O
- NH3
- CO2 - ANSWER-HCN
The total number of nonbonding electron pairs present in the Lewis structure of SiH4 is - ANSWER-zero
For which of the following pairs of elements would the compound formed between most likely be a
molecular compound
, - Li and Br
- Ba and O
- N and S
- Cs and F - ANSWER-N and S
What is the geometry of the molecular compound formed by the reaction of sulfur with hydrogen? -
ANSWER-angular
Which of the following sets of elements is arranged in order of decreasing electronegativity
- O, S, As
- Cl, B, Cl
- Br, Cl, P
- Be, C, O - ANSWER-O, S, As
If the electronegativity difference between two atoms X and Z is 1.0, the bond between the two atoms
would be - ANSWER-polar covalent
The formula mass of ammonium phosphite, (NH4)3PO3 is - ANSWER-133.09 amu
Which of the following equations is balanced
- FeS + 2HBr -> FeBr2 + 2H2S
- PbO2 + 2H2 -> Pb + 2H20
- Fe2O3 + 3H2 -> 2Fe + 3H2O
- more than one correct response
- no correct response - ANSWER-more than one correct response
Avagradro's number of sulfure (S) atoms would have a mass of
- 6.02 * 10^-23g
- 6.02 * 10^23 g
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