Honors Chemistry Final Exam Quizlet Guaranteed A+
Atom ️The basic unit of a chemical element.
Molecule ️Two or more atoms held together by covalent bonds
Physical change ️A change of matter from one phase to another without a change in chemical
properties (melting, freezing, boiling, ...
Molecule ✔️Two or more atoms held together by covalent bonds
Physical change ✔️A change of matter from one phase to another without a change in chemical
properties (melting, freezing, boiling, condensing, dissolving)
Phase change ✔️A change from one state (solid or liquid or gas) to another without a change in
chemical composition
Chemical change ✔️A change that produces matter with a different composition than the original
matter, aka different properties (evolution of gas, color change, formation of a precipitate,
release/absorption of energy)
Qualitative data ✔️Descriptive data: Information describing color, odor, shape, or some other physical
characteristic
Quantitative data ✔️Numerical data: Information associated with mathematical models and statistical
techniques used to analyze spatial location and association.
Observation vs. Inference ✔️Observation = information gathered by the five senses
Inference = logical explanation for an observation based on prior knowledge, context, etc
SI base units ✔️mass- kg or g
length- m
time- s
temp- K or C
amount of substance- mol
,electrical current- A (ampere)
luminous intensity - candela (cd)
*make sure you know the metric conversions (kilo, centi, milli, etc)
Temperature ✔️The average kinetic energy of particles making up an object (Fahrenheit is NOT used in
chemistry)
Density Formula ✔️Density = mass/volume
Accuracy vs. Precision ✔️Accuracy = how close experimental value is to accepted value
Precision = how closely measured values agree with each other
How to calculate percent error ✔️I (measured value - accepted value) / accepted value x 100 I
The "I" means absolute value btw :)
Significant figures 😬👎❌ ✔️The digits in a measurement that were actually measured
Rules:
*all non zero digits are significant (2.3 = 2 sig figs)
*all "captive" zeros are significant (2022 = 4 sig figs, 5000.1 = 5 sig figs)
*leading zeros are NOT significant (0.0012 = 2 sig figs, 00123 = 3 sig figs)
*Zeros at the end of a number, or "trailing zeros", are not significant UNLESS it is a decimal (230 = 2 sig
figs, 23.0 = 3 sig figs)
Scientific Notation ✔️Numbers expressed with one digit left of the decimal point and multiplied by a
power of ten
, When the number is above zero, the power of ten will be positive. When the number is less than zero,
the power of ten will be negative
In a calculation with different decimal placements, the answer is rounded to the least number of sig figs
(ex: A = b x h -> A = 10.513m x 8.78m -> A = 92.3m^2
Dimensional analysis ✔️The conversion of measurements to different units using conversion factors
ex: 6.25 days x (24 hours/1 day) = 150. hours
How to measure graduated cylinders ✔️The smaller the cylinder gets, the more precise the
measurements get/the more decimal places you include
(someone fact check me on this plz 🙏)
Matter ✔️Anything that has mass and takes up space
Phases of Matter ✔️1. solid
2. liquid
3. gas
4. plasma (but we don't talk about her )
Compound ✔️A substance made up of atoms of two or more different elements joined by chemical
bonds
Pure substance ✔️Only 1 kind of atom/molecule
*elements
*compounds (2+ atoms bonded)
Mixtures ✔️More than one atom/molecule
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, creditcard of Stuvia-tegoed voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper CertifiedGrades. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor €8,86. Je zit daarna nergens aan vast.
