Chem 101 Exam Questions With Answers
First periodic table - ANSWER- earth, air, water, fire
What are the states of matter? - ANSWER- solid, liquid, gas
What makes something solid? - ANSWER- particles are closely spaced, lowest kinetic energy, incompressible, definite shape and volume
Wh...
Chem 101 Exam Questions With
Answers
First periodic table - ANSWER- earth, air, water, fire
What are the states of matter? - ANSWER- solid, liquid, gas
What makes something solid? - ANSWER- particles are closely spaced, lowest kinetic
energy, incompressible, definite shape and volume
What makes something a liquid? - ANSWER- particles are closely spaced, but can slide
by each other, medium amount of kinetic energy, incompressible, assume the shape of
their container, fixed volume
What makes something a gas? - ANSWER- widely spaced particles, highly
compressible, fills container entirely (volume not fixed), assume shape of container,
highest amount of kinetic energy
Classifying matter - ANSWER- pure substance or a mixture
Pure substance - ANSWER- contains only 1 type of particle (element or molecule), any
element, a collection of like molecules (H2O, CO2, NaCl) (C, Au)
H - ANSWER- hydrogen
Li - ANSWER- lithium
N - ANSWER- nitrogen
O - ANSWER- oxygen
B - ANSWER- boron
Ne - ANSWER- neon
Na - ANSWER- sodium
Si - ANSWER- silicon
S - ANSWER- sulfur
P - ANSWER- phosphorus
Ar - ANSWER- argon
, Ca - ANSWER- calcium
Mixture - ANSWER- physical combination of 2 or more pure substances (salt water, air)
can be either homogeneous or heterogeneous
Homogeneous mixture - ANSWER- constant composition throughout (air, filtered
seawater, black coffee)
Elements - ANSWER- composed of only 1 type of atom
Compounds - ANSWER- chemical combinations of 2 or more elements bonded together
(CO2, H2O, NaCl)
Chemistry - ANSWER- the study of matter and its transformations
Matter - ANSWER- has mass and takes up space
Transformations of matter - ANSWER- can be either chemical or physical
transformations
Chemical transformations - ANSWER- atoms in the reactants are rearranged to form
new products (2H2(g)+O2(g)---> 2H2O (g)
Physical transformation - ANSWER- identity of the reactants is not changed (water in
solid phase going to water in liquid phase) (H2O(s)--> H2O(l))
Phases - ANSWER- s= solid
l= liquid
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