CHEM 101L UNC Final Updated Exam 2026 WITH
Recent Newest Verified And Well Analyzed Exam
Questions (Actual Exam 2026-2027) Correct
Detailed & Verified ANSWERS (100% Accurate
Solutions) ALREADY GRADED A+||NEWEST
VERSION Of The Exam Guarantee Pass!!
When should you not wear gloves in the laboratory setting? - ANSWERS-when entering
data into your ELN on your laptop; when writing notes on scratch paper using a pen and
paper
why does ice float on water? - ANSWERS-ice is less dense than liquid h2o
how does temperature affect the density of a solution? - ANSWERS-as temperature
increases, density decreases
does calibration using standards help improve the accuracy or precision of the
experiment? - ANSWERS-accuracy
What axis is the independent variable on? - ANSWERS-x-axis
what axis is the dependent variable on? - ANSWERS-y-axis
You make a solution of 0.1 M NaOH and accidentally spill the solution, covering your
gloved hand and onto your arm. Your wrist was exposed, and the solution came into
direct contact with your skin. What should you do? - ANSWERS-tell the TA and rinse
your skin for 15 minutes
, you are taking an evening laboratory session and want to bring a snack to make it
through the evening. When should you be allowed to have food at the bench top in the
lab? - ANSWERS-never
accuracy - ANSWERS-how close a measurement is to the true value
precision - ANSWERS-a measure of how close a series of measurements are to one
another
systematic error - ANSWERS-arises from a flaw in the equipment or experimental
design; can be detected and corrected; affects accuracy
example of systematic error - ANSWERS-incorrectly calibrated instrument; consistently
misreads it
random error - ANSWERS-arises from uncontrolled, and often uncontrollable, variables
in an experiment which has equal chance of being positive or negative; cannot be
detected or corrected for; affects precision
example of random error - ANSWERS-Human error and lack of instrument sensitivity
weighing by difference - ANSWERS-substance mass = mass of container with
substance - mass of container without substance
mean - ANSWERS-The sum of a set of numbers divided by the number of elements in
the set
standard deviation - ANSWERS-the square root of the sum of the average subtracted
from each measurement divided by the number of measurements
CV - ANSWERS-the standard deviation divided by the mean
Recent Newest Verified And Well Analyzed Exam
Questions (Actual Exam 2026-2027) Correct
Detailed & Verified ANSWERS (100% Accurate
Solutions) ALREADY GRADED A+||NEWEST
VERSION Of The Exam Guarantee Pass!!
When should you not wear gloves in the laboratory setting? - ANSWERS-when entering
data into your ELN on your laptop; when writing notes on scratch paper using a pen and
paper
why does ice float on water? - ANSWERS-ice is less dense than liquid h2o
how does temperature affect the density of a solution? - ANSWERS-as temperature
increases, density decreases
does calibration using standards help improve the accuracy or precision of the
experiment? - ANSWERS-accuracy
What axis is the independent variable on? - ANSWERS-x-axis
what axis is the dependent variable on? - ANSWERS-y-axis
You make a solution of 0.1 M NaOH and accidentally spill the solution, covering your
gloved hand and onto your arm. Your wrist was exposed, and the solution came into
direct contact with your skin. What should you do? - ANSWERS-tell the TA and rinse
your skin for 15 minutes
, you are taking an evening laboratory session and want to bring a snack to make it
through the evening. When should you be allowed to have food at the bench top in the
lab? - ANSWERS-never
accuracy - ANSWERS-how close a measurement is to the true value
precision - ANSWERS-a measure of how close a series of measurements are to one
another
systematic error - ANSWERS-arises from a flaw in the equipment or experimental
design; can be detected and corrected; affects accuracy
example of systematic error - ANSWERS-incorrectly calibrated instrument; consistently
misreads it
random error - ANSWERS-arises from uncontrolled, and often uncontrollable, variables
in an experiment which has equal chance of being positive or negative; cannot be
detected or corrected for; affects precision
example of random error - ANSWERS-Human error and lack of instrument sensitivity
weighing by difference - ANSWERS-substance mass = mass of container with
substance - mass of container without substance
mean - ANSWERS-The sum of a set of numbers divided by the number of elements in
the set
standard deviation - ANSWERS-the square root of the sum of the average subtracted
from each measurement divided by the number of measurements
CV - ANSWERS-the standard deviation divided by the mean
