Sig figs Study guides, Class notes & Summaries

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: When multiplying or dividing the answer always has the same number of sig figs as the calculation with the _____ Least decimal places - Rules for mathematical operations: When adding or sub...

How many Sig Figs in 0.008202 - 4 How many sig figs would be in the answer of 6.6 multiplied by 3.56007 - 2 How can we calculate the number of neutrons? - Number of neutrons = mass number (A) - number of protons/ atomic number (Z) How can we calculate the atomic charge? - Atomic charge= number of protons- number of electrons Avogadro's number - 6.022 x 10^23. The number of particles in exactly one mole of a pure substance atomic mass unit (amu) - one twelfth the mass of a carbon-12 a...

Accuracy? CORRECT ANSWER Closeness of measurements to the TRUE VALUE of what is being measured Precision? CORRECT ANSWER Closeness of a SET of measurements How do you calculate Percent Error? CORRECT ANSWER I experimental-accepted I ____________________ x 100 accepted value Are zeros infront of non-zero digis significant? CORRECT ANSWER 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? CORRECT ANSWER Yep! ex: 9.1...

Analytical Balance - 5 sig figs or 4 if unstable and a line over the 4th digit Thermometer - Three sig figs (20.5) graduated cylinder (50mL) - 3 Sig Figs (50.2) Graduated Cylinder (10mL) - 4 sig figs (10.25) volumetric flask - 5 sig figs Buret - 4 sig figs (27.22) Pipet - 4 sig figs (.02500L) adding and subtracting sig figs - least number of decimal places added or subtracted - 12.2 + 5.44 = 17.6 multiplying or dividing sig figs - the least number is the number of sig figs you can have ...

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? - Round number...

4 concepts of Dalton's atomic theory and their correctness - 1. All matter is composed of indivisible particles (atoms) (can split atoms but this is generally correct) 2. atoms and indestructible and unchangeable (can change with extraneous outside methods, but still true) 3. all atoms of a given element are identical (false because of isotopes) 4. compounds are formed when atoms of different elements combine (true) absolute numbers - counts rather than measurements, conversion factors; i...

Accuracy? - correct answer Closeness of measurements to the TRUE VALUE of what is being measured Precision? - correct answer Closeness of a SET of measurements How do you calculate Percent Error? - correct answer I experimental-accepted I ____________________ x 100 accepted value Are zeros infront of non-zero digis significant? - correct answer 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? - correct an...

IRSC Chem test 1 questions & answers 2024/2025 All digits 1-9 are - ANSWERSsignificant leading zeros are - ANSWERSnot significant Captive zeros (0's between digits) are - ANSWERSsignificant trailing 0's - ANSWERSare significant at the end of a # only if the # contains a decimal point .03070 How many Sig fig ? - ANSWERS4 500 how many sig figs? - ANSWERS1 500.01 sig fig ? - ANSWERS4 1 meter = ____ mm - ANSWERS1000 mm 1 meter = ____ centimeters - ANSWERS100 centimete...

UT Online High School Chemistry A Final Exam Thorough Review, Complete Solution Accuracy how close a measurement is to the true value dependent variable changes in response to the independent variable (what you measure in an experiment and what's affected during the experiment) Hypothesis a proposed explanation for an observation Independent variable (often denoted by x) doesn't depend on something else Scientific notation how scientists handle large or small numbers Significant Fig...

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: