CHEM-120 CHAMBERLAIN FINAL EXAM-Questions with Correct
Answers/ Verified/ Latest Update (2024/2025)
Chemistry - ✔✔The study of the properties of matter and how matter changes
Basic Unit in Chemistry - ✔✔atom
Types of Chemistry - ✔✔Green Chemistry
Sustainable Chemistry
green chemistry - ✔✔uses materials and processes that are intended to prevent or reduce
pollution at its source
replacing rare hazardous with more abundant less hazardous
Example of green chemistry - ✔✔replacement of mercury fluorescent light bulbs with
efficient mercury free light bulbs
Green Chemistry Solar Fuels - ✔✔sunlight is abundant source of energy
plants store solar energy as chemical energy via photosynthesis
artificial photosynthesis - ✔✔can be used to generate hydrogen fuel
H fuel can then be reacted with O to produce heat and electricity
water---->hydrogen + oxygen
sustainable chemistry - ✔✔designed to meet the needs of the present generation without
compromising the needs of future generations
Matter - ✔✔Anything that has mass and takes up space
mass - ✔✔A measure of the amount of matter in an object
,weight - ✔✔A measure of the gravitational force exerted on the matter of an object.
Classes of Matter - ✔✔Solids, Liquids, Gas
Solid - ✔✔Definite shape and volume
vibration
ice, brick, wood,
liquid - ✔✔A state of matter that has no definite shape but has a definite volume.
move in irregular pattern
petrol, vinegar, paint, water
gas - ✔✔A state of matter with no definite shape or volume
freely move continuously- far apart
helium, oxygen, carbon monoxide, hydrogen
melting point - ✔✔The temperature at which a solid becomes a liquid
Vaporation - ✔✔Liquid to gas
boiling Point - ✔✔temp at which liquid escapes and becomes a gas
condensation - ✔✔Gas to liquid
freezing - ✔✔liquid to solid
occurs at freezing point/same as melting point
,Sublimation - ✔✔A change directly from the solid to the gaseous state without becoming
liquid
Ex: dry ice
2 categories of matter - ✔✔substances and mixtures
Substance - ✔✔A single kind of matter that is pure and has a specific set of properties.
Substance contains - ✔✔Elements and Compounds
Elements - ✔✔A molecule composed of one kind of atom; cannot be broken into simpler
units by chemical reactions.
represented by chemical groups:
Cl, H, Mg
Compounds - ✔✔2 or more elements chemically combined
many exist as groups of atoms bonded together as molecules
Atoms - ✔✔Building blocks of matter
smallest particle in an element
Aristotle - ✔✔A Greek Philosopher,
all matter is composed of 4 elements
all matter is continuous not atomistic
WEAF- water, earth, air, water
Atomos - ✔✔Lecuippus/democritus
point at which matter can no longer be subdivided
, Mixtures - ✔✔A combination of two or more substances that are not chemically combined
homogeneous mixture - ✔✔a mixture that is uniform in composition; components are
evenly distributed and not easily distinguished
Ex: sugar and water
heterogeneous mixture - ✔✔A mixture that is not uniform in composition; components are
not evenly distributed throughout the mixture
Ex: oil and water
Measurement of Matter - ✔✔mass
Measurements of length - ✔✔meters
1 m= 100 cm
1000 m=1 km
0.0254 m = 1 inch
Measurement of mass - ✔✔kilograms
0.454 kg=1 lbs
1 kg= 2.2 lbs
.001 kg= 1 g
1g= 1000 mg
Measurement of volume - ✔✔liter (L)
1 gal = 3.79 L
.26 gal= 1 L
1000 ml = 1 L
measurement of time - ✔✔seconds
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