Chem 105; Final exam study guide Questions with Correct Answers
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Course
Chem 105
Institution
Chem 105
What are the three states of matter? Correct Answer-Solid, liquid, and gas
What are significant figure rules? Correct Answer-All nonzero numbers are significant. Trailing zeros are significant. Everything between nonzero numbers.
What are the significant figure rules for addition/subtraction ...
Chem 105; Final exam study guide Questions with
Correct Answers
What are the three states of matter? Correct Answer-Solid, liquid, and
gas
What are significant figure rules? Correct Answer-All nonzero numbers
are significant. Trailing zeros are significant. Everything between
nonzero numbers.
What are the significant figure rules for addition/subtraction and for
multiplication/division? Correct Answer-Addition/subtraction=use the
smallest number of decimal places given
Multiplication/division= round to least number of significant figures
given
What is the difference between a homogeneous and heterogeneous
solution? Correct Answer-Homogeneous mixtures are evenly dispersed
while heterogeneous mixtures are not.
What are the three subatomic particles? What are their charges? What
are their masses in order from lowest to highest? Correct Answer-
electron(-) < proton (+) < neutron
What do we call atoms that have lost an electron? Gained one? Correct
Answer-Cations have lost one; anions have gained one
, What is the difference between accuracy and precision? Correct Answer-
Accuracy is how close a value is to the correct value; precision is being
able to conduct the experiment/calculation multiple times and get very
close results
How do you find each of the three units of measurement for
temperature? Correct Answer-F= (9/5) C + 32
C= (5/9) (F-32)
K= C+ 273
What is avagadros number? What does this have to do with finding the
moles of a substance? Correct Answer-6.022E23; this is how many
particles there are in one mol; one mol equals the molecular weight that
is displayed on the periodic table
What is the order of the different classifications of electromagnetic
radiation? Correct Answer-Radio, Microwaves, Infrared, Visual,
Ultraviolet, X-rays, Gamma
(rabbits mate in very unusual Xpensive gardens)
How are frequency and wavelength related? What is the formula to find
them? Correct Answer-They are inversely related.
Frecuency= C/wavelength (C= speed of light)
What is the order of the colors on the electromagnetic spectrum in order
from longest wavelength to shortest wavelength? Correct Answer-Red,
orange, yellow, green, blue, indigo and violet
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