Sig figs Study guides, Class notes & Summaries

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...

Fahrenheit Equation correct answers Tf=(Tc x 9℉/5℃) + 32℉ Celsius Equation correct answers Tc= 5℃/9℉ (Tf - 32℉) More Equations correct answers Ep=h x v c=weird symbol x v Average Velocity of a Gas Particle correct answers Vrms = square root (3RT/MM) R= gas law constant T= temperature MM= molar mass of gas particles Base for log correct answers It is 10 10^5 log10(100,000)=5 Base for ln correct answers e Euler's number Rules for Counting Significant Figure...

Accuracy? - Closeness of measurements to the TRUE VALUE of what is being measured Precision? - Closeness of a SET of measurements How do you calculate Percent Error? - I experimental-accepted I ____________________ x 100 accepted value Are zeros infront of non-zero digis significant? - 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? - Yep! ex: 9.100 is 4 sig figs Addition/Subtraction in regards to sig figs? ...

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...

Significant Figures Questions and Answers Scored A+ Rules for identifying significant figures 1) All non-zero digits are significant 2) Zeros that occur between significant digits are significant 3) Zeros to the right of the decimal point AND at the end of the number are significant Rules for using significant figures with addition and subtraction 1) Count the number of significant figures to the right of the decimal point for each number in the problem 2) Add or subtract normally ...

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?...

Chemistry Cumulative Test 1 Review Exam Questions With Complete Solutions add & subtract with sig figs ️️round to digit they all share multiply and divide sig figs ️️round to lowest number of sig figs 1.672*e-27 ️️.0000000...1672 giga ️️billion mega ️️million kilo ️️thousand centi ️️hundred milli ️️thousand

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,...