Sig figs Study guides, Class notes & Summaries
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Chemistry 1331 TOP Study Guide Exam Questions and CORRECT Answers
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All of them - what measured quantity have uncertainity? 
Certain digits - Digits which are not estimated 
Uncertain digits - Digits which must be estimated 
True value - The accepted value for a measurement accomplished by repeating 
measurement or theoretically from first principles 
Accuracy - How close a measurement is to the true value 
Precision - How well multiple measurements agree with one another 
Least sig figs - Rules for mathematical operations:
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Chemistry Exam 1 (Chapters 1-4) Solved 100% Correct
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Chemistry - ANSWER-The Study of Matter 
 
Matter - ANSWER-Anything that occupies spaces and has mass 
 
How do Chemists Study Matter? - ANSWER-The Scientific Method 
 
Steps of The Scientific Method - ANSWER-Observation 
Hypothesis 
Experiments 
 
Theory - ANSWER-is an explanation of why 
 
Law - ANSWER-is a summary of observations that are true 
 
Volume - ANSWER-Measure of the amount of 3-D space occupied by a substance 
 
Classes of zeros - ANSWER-Leading, Captive, and Trailing 
 
Leading Zer...
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Chem 120 Exam 1| 64 Questions| With Complete Solutions
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SI unit for Temperature correct answer: C 
 
F correct answer: (9/5 C) + 32 
 
C correct answer: 5/9 (F -32) 
 
K correct answer: C+273.15 
 
density correct answer: mass/volume 
 
1 mL correct answer: =1cm^3 = 1cc 
 
percent error correct answer: difference from known value/known value x 100 
 
sig fig for Addition/Subtraction correct answer: answer has the same number of decimal places as the factor with the least amount of decimal places 
 
sig fig rules for multiplication/ division c...
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chem 121 study guide exam 1 updated Rated 100% Correct!!
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Hypothesis vs Theory vs Law - Answer-Hypothesis: If, then, because 
Law: Statement or equation about a relationship 
- ex: force = mass * gravity 
Theory: Explains why a law exists 
Law of Conservation of Mass - Answer-Mass is always constant 
- Reactant mass = Product mass 
They are used (upheld) in chemical equations 
Three common states of matter and their characteristics - Answer-- Solid (s): color 
- Liquid (aq): melting point, solubility 
- Gas (g): 
Difference between Elements, Compounds,...
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Chemistry 1212 Lab Final Exam Complete Questions and Answers
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Chemistry 1212 Lab Final Exam 
Complete Questions and Answers 
Introductory Lab - CORRECT ANSWER-Purpose: Review of sig figs, slope formula (Y2- 
Y1/X2-X1); percent error formula ([Accepted-Experimental (/) Accepted] x 100%); 
rounding, scientific notation, & excel. 
Procedure: Measured various objects for circumference (C=2πr) and diameter (2r), then 
produced a graph comparing the two factors. 
Results: N/A 
Significant Figure Rules - CORRECT ANSWER-1. All non-zeros are significant. 
Ex: ...
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CHEM-C125 ASSESSMENT TEST QUESTIONS WITH CORRECT ANSWERS CHEM-C125 ASSESSMENT TEST QUESTIONS WITH CORRECT ANSWERS
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CHEM-C125 ASSESSMENT TEST QUESTIONS WITH CORRECT ANSWERS 
 
A solid sample contains both NaOH and NaCl. 0.500 g of this solid sample was dissolved in water to make a 20.0 mL solution and then this solution was titrated by 0.500 mol/L HCl solution. If 22.5 mL of HCl was used to reach the end point, what is the mass % of NaOH in the original solid sample? 
NaOH + HCl --> NaCl + H2O - Answer- 90 
 
During titration, it is very common to have some NaOH spilled to the inside wall of Erlenmeyer fl...
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CHEM 207 REVIEW EXAMS QUESTIONS AND ANSWERS
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CHEM 207 
REVIEW EXAMS QUESTIONS AND ANSWERS 
 
Practice questions for the exam with solutions. For you to do well on the exam, please work on the questions before looking at the solutions. If you find an error, let me know so I can let everyone know. REMEMBER THE EXAM IS ON Monday, Sept 28th on Top Hat. The exam will have 20 questions and only one hour. Studying the lecture ppts and lecture questions would also be helpful. 
Lecture 1A questions: Density and stat analysis, Q and T tables, % Tole...
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Chem 210 Test 1 with 100% correct answers.
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matter 
anything with a mass and takes up space (volume) 
 
 
 
states of matter 
solid, liquid, gas 
 
 
 
solid (s) 
rigid, hard shape, definite volume 
 
 
 
liquid (l) 
fluid, takes shape of container and definite volume (molecules have interactions-intermolecular forces) 
 
 
 
gas (g) 
fills up container and volume is defined by volume of container (molecules are very far apart so no interaction) 
 
 
 
properties of matter 
physical and chemical properties 
 
 
 
physical property 
a prop...
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Chemistry Final ACS Exam |Question and Answer| 100% Correct 2024/2025
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Chemistry Final ACS Exam |Question 
and Answer| 100% Correct 2024/2025 
Accuracy? *Ans* Closeness of measurements to the TRUE VALUE of what is being 
measured 
Precision? *Ans* Closeness of a SET of measurements 
How do you calculate Percent Error? *Ans* I experimental-accepted I 
____________________ x 100 
accepted value 
Are zeros infront of non-zero digis significant? *Ans* Nope! 
ex: 0.0071 is only 2 sig figs 
Are zeros at the end of a number and to the right of the decimal significant?...
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Chem 210 Final exam study guide questions and answers
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What is ground state electron configuration of Co? 
[Ar]3d^9 
[Ar]4s^1 3d^8 
[Ar]4s^2 3d^7 
[Ar]4s^2 4p^6 4d^1 
[Ar]4s^2 3d^7 
 
 
 
molybdenum has an anomalous electron configuration. using the shorthand notation for electron configurations, write the electron configuration 
A) [kr]5s 4d^6 
B) [kr]5s 4d^0 5p^6 
C) [kr]5s^1 4d^5 
D) [kr]5s^2 4d^4 
C) [kr]5s^1 4d^5 
 
 
 
the symbol [Kr] represents 
a) 4s^2 4p^6 
b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6 
c) 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 
D)1s^2 2s^...
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