C125 - Study guides, Class notes & Summaries
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CHEM-C125 Final Exam Questions with Latest Update
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In Atomic Spectra lab, Vernier angles (V) in degrees of a Hg-lamp has a linear dependence on wavelength (λ) in nm of line spectra: V = 0.146 λ−10.85 
a) Predict the Vernier angle in degree for a line that has a wavelength of 510 nm. 
b) If a student found a line at a Vernier angle of 76.5°, what is the wavelength in nm of this line? - Answer- a) 63.61 
b) 598.288 
 
Best-fit line equation commonly takes "y=mx+b" format. What are y, x, m and b? - Answer- y = y-value 
x= x-value 
m = slope ...
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C125 REVISION EXAM QUESTIONS WITH COMPETE SOLUTIONS
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C125 REVISION EXAM QUESTIONS WITH COMPETE SOLUTIONS 
 
In the molar mass lab, why was it important to level the water in the graduated cylinder with that in the through? - Answer- so that the pressure inside the cylinder would equal atmospheric pressure 
 
butane hazards - Answer- butane lighter fluid is extremely flammable. it is a mixture of two isomers both of which boil at temperatures below 0°C at 1 atm pressure. the gas is stored as a liquid in the pressurized container. However, when th...
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C125 SIMPLE EXAM QUESTIONS WITH CORRECT ANWERS
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If we apply the HOMO and LUMO concepts in atomic orbitals, we will have HOAO (Highest Occupied Atomic Orbitals) and LUAO (Lowest Unoccupied Atomic Orbitals). What is the LUAO of Na atom? - Answer- 3p 
 
Which one is correct about the bond lengths in PCl5? 
 
Equatorial bonds are longer because they experience smaller repulsion 
 
The axial bonds are shorter because they are far away from other bonds 
 
All P-Cl bonds have the same bond length. 
 
Axial bonds are longer because they experienc...
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C125 MIDTERM EXAM QUESTIONS AND ASWERS
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C125 MIDTERM EXAM QUESTIONS AND ASWERS 
 
If 11.3 g of NaCl is dissolved in 100. g of water, what is the percent by mass (mass%) concentration of NaCl in the solution? 
 
Note: 
 
1. Use three sig figs for your final answer. 
 
2. Do not enter your answer as fractions. For example, if you think 30% is the correct answer, enter either "30" or "30%". Do NOT enter "0.30". - Answer- 10.2 
 
How many moles of NaOH will be needed to neutralize 0.86 mol of H2SO4? The following equation is NON-bal...
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C125 Final Questions and Answers
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PCl5 - Answer- All of the following molecules have all bonds being equivalent except: 
SF6 
CH4 
NH3 
PCl5 
 
lone pair to lone pair - Answer- Which of the following has the largest repulsion, assuming that all the angles between electron pairs are identical? 
 
-They are all the same because they all contain the same number of electrons 
-lone pair to lone pair 
- bonding to bonding pair 
-lone pair to bonding pair 
 
square planar - Answer- What is the molecular geometry of XeF4? 
 
none of ...
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C125 Midterm Quizzes Questions and Answers
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Rearrange the following equation to solve for P. 
 
(P+a)(V-b)=nRT - Answer- P=(nRT/V-b) -a 
 
What is the slope if B is plotted on y-axis and A is plotted on x-axis? 
 
5A + 3B = 8 - Answer- -5/3 
 
In an experiemnt, the best-fit-line equation between Absorbance (A, unitless) and concentration (c, mg/mL) is used to calculate the concentration of Fe. Based on the best-fit line equation given below, what is the concentration of Fe if the absorbance is 1.25? 
 
A = 851 c + 0.03 - Answer- 0.0014 
 ...
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C125 FINAL EXAM QUESTIONS AND ANSWERS
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C125 FINAL EXAM QUESTIONS AND ANSWERS
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C125 Exam Questions with correct answers 2024
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Aliquot - Answer- - *Portion of measurement added* 
 
- Example: "In this experiment, we will be using an *aliquot* of 10 mL of water for each trial 
 
Sig Fig Rules (Significant) - Answer- - Any non-zero digit is a sig fig 
 
- Zeros between non-zeros are sig figs 
 
- Zeros to the right of the last non-zero digit are sig figs 
 
Sig Fig Rules (Insignificant) - Answer- - Zeros to the left of the first non-zero are NOT sig figs 
 
Calculations Rules for Sig Figs (+/-) - Answer- - Focus on decim...
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Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 12: Warfare and British society, c1250–present and London and the Second World War, 1939–45 QP May 2024
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Pearson Edexcel GCSE (9–1) History PAPER 1: Thematic study and historic environment Option 
12: Warfare and British society, c1250–present and London and the Second World War, 1939–45 
QP May 2024
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C215 Exam Bundle (Graded A+)
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Exam (elaborations)
C125 Exam Questions with correct answers 2024


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C125 Final Lab Exam Questions with Latest Update


Exam (elaborations)
C125 Final Questions and Answers


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C125 Midterm Exam Questions with Verified Answers


Exam (elaborations)
C125 Final- Correct Answers Latest Update


Exam (elaborations)
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