Chem 1120 Exam 1 Chapters 1, 2, & 11 Latest Update
CHAPTER 1: Matter & Measurements - ANSWER -chem & physical
properties/changes
-solid, liquid, or gas
-pure, impure, heterogeneous, homogeneous
-sig figs
-scientific notation
-conversion factors
-temperature conversions
-specific heat
-density/specific gravity
What is the size and shape of a sample of gas? - ANSWER no definite shape or
volume
What is the size and shape of a sample of liquid? - ANSWER indefinite shape but
definite volume
What is the size and shape of a sample of solid? - ANSWER definite shape &
volume
What are physical properties? - ANSWER characteristics that can be observed
without changing it into another substance.
Ex.) shape, size, color, taste, density, melting/boiling point.
What are chemical properties? - ANSWER describes how a substance may
change or react to form a new substance.
Ex.) flammability & reactivity of a substance, burning
Chemistry - ANSWER The study of the composition, structure, properties, &
reactions of matter.
pure substance - ANSWER Matter that always has exactly the same composition
pure substance can be classified as either a(n): - ANSWER element or
compound
, an element - ANSWER composed of one type of atom
Ex.) Neon
a compound - ANSWER composed of more than one type of atom; contains
different elements attached to eachother.
if matter isn't pure it's.... - ANSWER impure
Mixture & an example - ANSWER A combination of two or more substances that
are not chemically combined (they retain their properties)
Ex.) Water + Ethanol =mixture not chemically combined. Both are clear; different
parts of the mixture are not visible
heterogeneous mixture - ANSWER A mixture that is not uniform in composition;
components are not evenly distributed throughout the mixture.
Ex.) oil & vinegar, pizza. Think of a recipe. No one makes it the same way. Not
always even amounts of each.
homogeneous mixture - ANSWER a mixture that is uniform in composition;
components are evenly distributed and not easily distinguished.
Ex.) saltwater , sugar water
expressing chemical change - ANSWER reactants: —> products:
Water Hydrogen + Oxygen
H2O H2 + O
1 kilogram = ____ grams - ANSWER 1000
1 Deciliter (d) = ______ L - ANSWER 0.1
1 centimeter = ___ meters - ANSWER 0.01
1 Milligram=__ Gram(s) - ANSWER 0.001
scientific notation general format - ANSWER C x 10^n
when writing in scientific notation the coefficient has to be between what
numbers? - ANSWER Coefficient C between 1&9
exponent of 10 is...? - ANSWER the number of times you move the decimal
when the decimal is moved to the left the exponent is? - ANSWER POSITIVE
when the decimal is moved to the right the exponent is? - ANSWER NEGATIVE
Mass is measured in? - ANSWER kilograms 1kg=2.205lb
CHAPTER 1: Matter & Measurements - ANSWER -chem & physical
properties/changes
-solid, liquid, or gas
-pure, impure, heterogeneous, homogeneous
-sig figs
-scientific notation
-conversion factors
-temperature conversions
-specific heat
-density/specific gravity
What is the size and shape of a sample of gas? - ANSWER no definite shape or
volume
What is the size and shape of a sample of liquid? - ANSWER indefinite shape but
definite volume
What is the size and shape of a sample of solid? - ANSWER definite shape &
volume
What are physical properties? - ANSWER characteristics that can be observed
without changing it into another substance.
Ex.) shape, size, color, taste, density, melting/boiling point.
What are chemical properties? - ANSWER describes how a substance may
change or react to form a new substance.
Ex.) flammability & reactivity of a substance, burning
Chemistry - ANSWER The study of the composition, structure, properties, &
reactions of matter.
pure substance - ANSWER Matter that always has exactly the same composition
pure substance can be classified as either a(n): - ANSWER element or
compound
, an element - ANSWER composed of one type of atom
Ex.) Neon
a compound - ANSWER composed of more than one type of atom; contains
different elements attached to eachother.
if matter isn't pure it's.... - ANSWER impure
Mixture & an example - ANSWER A combination of two or more substances that
are not chemically combined (they retain their properties)
Ex.) Water + Ethanol =mixture not chemically combined. Both are clear; different
parts of the mixture are not visible
heterogeneous mixture - ANSWER A mixture that is not uniform in composition;
components are not evenly distributed throughout the mixture.
Ex.) oil & vinegar, pizza. Think of a recipe. No one makes it the same way. Not
always even amounts of each.
homogeneous mixture - ANSWER a mixture that is uniform in composition;
components are evenly distributed and not easily distinguished.
Ex.) saltwater , sugar water
expressing chemical change - ANSWER reactants: —> products:
Water Hydrogen + Oxygen
H2O H2 + O
1 kilogram = ____ grams - ANSWER 1000
1 Deciliter (d) = ______ L - ANSWER 0.1
1 centimeter = ___ meters - ANSWER 0.01
1 Milligram=__ Gram(s) - ANSWER 0.001
scientific notation general format - ANSWER C x 10^n
when writing in scientific notation the coefficient has to be between what
numbers? - ANSWER Coefficient C between 1&9
exponent of 10 is...? - ANSWER the number of times you move the decimal
when the decimal is moved to the left the exponent is? - ANSWER POSITIVE
when the decimal is moved to the right the exponent is? - ANSWER NEGATIVE
Mass is measured in? - ANSWER kilograms 1kg=2.205lb
