NDSU Chem 121 Exam 1 Questions and Answers
giga
G, 10^12
mega
M, 10^6
kilo
k, 10^3
deci
d, 10^-1
centi
c, 10^-2
milli
m, 10^-3
micro
μ, 10^-6
nano
n, 10^-9
pico
p, 10^-12
femto
f, 10^-15
Fahrenheit to Celsius
(9/5) x...
Dalton's Atomic Theory - answer 1. Elements are composed of atoms.
2. All atoms of an element are identical and are different from atoms of all other
elements.
3. Compounds are composed of atoms from multiple elements combined in a whole
number ration. (Law of definite proportion)
4. A chemical reaction doesn't result in creation/destruction of atoms. (law of
conservation of mass)
Law of Definite Proportions - answer Different samples of the same compound
always contain the elements in the same proportion by mass (Proust)
, Law of Conservation of Mass - answer Matter can be neither created nor destroyed
(Lavoisier)
Chemistry - answer Study of matter and how the properties of matter are related to
composition
Matter - answer Anything that has mass and occupies space
Mass - answer measure of amount of matter (independent of gravitational force)
Weight - answer force of attraction by the earth
W= m x g (mass times gravity)
Fundamental Forces of Nature - answer 1. Gravitational - weakest but longest range
2. Electromagnetic
3. Strong & Weak forces of the nucleus - strongest but shortest range
2 Types of Experiments - answer 1. Support hypothesis
2. Disprove ideas/explanation (preferred)
Law - answer verbal statement or mathematical equation that summarizes
observations and experiments
Hypothesis - answer a tentative, initial, explanation of the observations
Theory - answer a hypothesis that repeatedly withstands the test of experiments and
has overwhelming supportive evidence
Physical properties of matter - answer Measured without changing the
identity/composition of the substance.
Ex. melting/boiling points, color, density, mass
Chemical properties of matter - answer Describe the way a substance reacts to form
other substances. Changes composition/identity!!
SI Base Units:
Length
Mass
Time
Temperature
Amount of Substance - answer meter
kilogram
second
kelvin
mole
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Pogba119. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
