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Straighterline CHEM101 General Chemistry I A Graded Exam (New Version 2024-25) with Complete Solutions
Straighterline CHEM101 General Chemistry I A Graded Exam (New Version 2024-25) with Complete Solutions
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Straighterline CHEM101 General Chemistry I AGraded Exam (New Version 2024-25) with
Complete Solutions
What 4 factors impact the rate of a reaction? - ✔✔Surface area
Concentration
Temperature
Catalyst
A reaction that RELEASES energy in the form of heat - ✔✔exothermic reaction
A reaction that ABSORBS energy in the form of heat - ✔✔endothermic reaction
How many particles/atoms/molecules are in a mole? - ✔✔6.022 x 10^23 particles
Surface area impacts rate of reaction how? - ✔✔Amount of area exposed for the reaction of
a solid
Concentration impacts rate of reaction how? - ✔✔increase the # of reactants in the
container, more collisions occur w/enough energy & proper orientation
Temperature impacts rate of reaction how? - ✔✔Higher temperature....more motion....more
forceful or higher energy collisions
pressure increases, volume decreases
pV = constant or p1V1 = p2V2 - ✔✔Boyle's Law
,Volume goes up, then temperature goes up, pressure remains the same
V/T = constant or V1/T1 = V2/T2 - ✔✔Charles' Law
volume increases with number increases
v/n - ✔✔Avogadro's Law
increase in temperature & increase in pressure
p/T = constant or p1/T1 = p2/T2 - ✔✔Guy-Lussac's Law
PV = nRT - ✔✔Ideal Gas Law
When do you use the Ideal gas law? - ✔✔when 3 variables are given in an question
Name three ways reactions occur? - ✔✔- reacting particles must collide
- collisions have proper orientation
- particles must have a strong enough energy to collide
reactant that gets completely used up, which stops the reaction & thus limits the amount of
product made - ✔✔limiting reactant
0 Kelvin - ✔✔absolute zero
form of matter that has definite (constant) composition and distinct properties
Ex: salt (sodium chloride), iron, water, CO2 - ✔✔Substance
solids and liquids - ✔✔condensed phases
,liquids and gases - ✔✔fluids
composition is NOT uniform throughout
Ex: mix sand and iron fillings - ✔✔Heterogenous Mixture
composition is uniform throughout; solution
Ex: dissolve sugar in water - ✔✔Homogenous Mixture
measured, expressed using numbers and units - ✔✔Quantative Properties
Celsius to Kelvin - ✔✔K = degrees C + 273.15
Chemistry is referred to ____ ____ because knowledge of the principles of chemistry facilitate
understanding of other sciences - ✔✔central science
the study of matter and how it changes - ✔✔Chemistry
Observation > Hypothesis > Experiment > Model/Theory > Further Experiment
observations > laws
data > hypotheses
successful hypotheses > theories - ✔✔Scientific Method
Fahrenheit to Celsius - ✔✔C = (degrees F - 32) (5/9)
Celsius to Fahrenheit - ✔✔F = (degrees C + 32) (9/5)
, find density - ✔✔d = m/v
find volume - ✔✔v = m/d
find mass - ✔✔m = dv
doesn't require explicit measurement - ✔✔Qualitative Property
state of matter changes, but identity of matter doesn't change - ✔✔physical change
substance is transformed into different substance(s) - ✔✔chemical change
measured value depends on amount of matter; values of same extensive properties can be
added
Ex: mass, length - ✔✔extensive property
value does NOT depend on matter; cannot be added
Ex: density, temperature - ✔✔intensive property
how close a measurement is to the true value - ✔✔accuracy
how close a group of measurements are to each other - ✔✔precision
meausured numbers - ✔✔inexact numbers
numbers obtained by counting or are part of a definition - ✔✔exact numbers
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