CHEM 103 MODULE 1 TO 6 EXAM LATEST QUESTIONS &
CORRECT ANSWERS PORTAGE LEARNING|COMPLETE AGRADE
Scientific Method - ANSWER: A series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the hypothesis, and stating
conclusions.
independent variable - ANSWER: The experimental factor that is manipulated; the
variable whose effect is being studied. (X)
dependent variable - ANSWER: a variable (often denoted by y ) whose value depends
on that of another.
Which phases take shape of container - ANSWER: Liquid and gas
A substance's melting point is the same as its ________ - ANSWER: freezing point
Celcius to Kelvin - ANSWER: K=C+273
Celcius to Fahrenheit - ANSWER: F=9/5(C) + 32
Density - ANSWER: mass/volume
extensive properties - ANSWER: depend on the amount of matter that is present
intensive property - ANSWER: a property that depends on the type of matter in a
sample, not the amount of matter
kg to pounds - ANSWER: 1 kg = 2.2 lbs
Liters to cm^3 - ANSWER: 1 L = 1000 cm^3
mL to cm^3 - ANSWER: 1mL=1cm^3
significant figures - ANSWER: All the digits that can be known precisely in a
measurement, plus a last estimated digit
Which numbers aren't significant - ANSWER: Leading zeros
Rules for rounding addition and subraction - ANSWER: Round result to same number
of decimal places as the number with least decimal places
Rounding rules for multiplication and division - ANSWER: Round the result to the
same number of digits as the number with the least amount of digits
, Speed - ANSWER: distance/time
dimensional analysis - ANSWER: A calculation method in which arithmetic steps are
accompanied by canceling units that represent physical dimensions
Meters to yards - ANSWER: 1 m = 1.0936 yd
in to cm - ANSWER: 1in=2.54cm
km to mi - ANSWER: 1 km = 0.6214 mi
mi to m - ANSWER: 1 mi = 1609.34 m
L to qt - ANSWER: 1 L = 1.0567 qt
qt to L - ANSWER: 1 qt = 0.94635 L
ft^3 to L - ANSWER: 1 ft^3 = 28.317 L
oz to g - ANSWER: 1 oz = 28.349g
tbsp to mL - ANSWER: 1 tbsp = 14.787 mL
oz to grams (weight) - ANSWER: 1 oz = 28.35 g
Atom - ANSWER: Smallest particle of an element
chemical change - ANSWER: A change in matter that produces one or more new
substances
chemical property - ANSWER: behavior that is related to the change of one kind of
matter into another kind of matter
Compound - ANSWER: A pure substance made of two or more elements chemically
combined
Element - ANSWER: A pure substance made of only one kind of atom
Molecule - ANSWER: bonded collection of two or more atoms of the same or
different elements
physical change - ANSWER: A change in a substance that does not change its identity
Physical property - ANSWER: A characteristic of a pure substance that can be
observed without changing it into another substance
pure substance - ANSWER: homogeneous substance that has a constant composition
CORRECT ANSWERS PORTAGE LEARNING|COMPLETE AGRADE
Scientific Method - ANSWER: A series of steps followed to solve problems including
collecting data, formulating a hypothesis, testing the hypothesis, and stating
conclusions.
independent variable - ANSWER: The experimental factor that is manipulated; the
variable whose effect is being studied. (X)
dependent variable - ANSWER: a variable (often denoted by y ) whose value depends
on that of another.
Which phases take shape of container - ANSWER: Liquid and gas
A substance's melting point is the same as its ________ - ANSWER: freezing point
Celcius to Kelvin - ANSWER: K=C+273
Celcius to Fahrenheit - ANSWER: F=9/5(C) + 32
Density - ANSWER: mass/volume
extensive properties - ANSWER: depend on the amount of matter that is present
intensive property - ANSWER: a property that depends on the type of matter in a
sample, not the amount of matter
kg to pounds - ANSWER: 1 kg = 2.2 lbs
Liters to cm^3 - ANSWER: 1 L = 1000 cm^3
mL to cm^3 - ANSWER: 1mL=1cm^3
significant figures - ANSWER: All the digits that can be known precisely in a
measurement, plus a last estimated digit
Which numbers aren't significant - ANSWER: Leading zeros
Rules for rounding addition and subraction - ANSWER: Round result to same number
of decimal places as the number with least decimal places
Rounding rules for multiplication and division - ANSWER: Round the result to the
same number of digits as the number with the least amount of digits
, Speed - ANSWER: distance/time
dimensional analysis - ANSWER: A calculation method in which arithmetic steps are
accompanied by canceling units that represent physical dimensions
Meters to yards - ANSWER: 1 m = 1.0936 yd
in to cm - ANSWER: 1in=2.54cm
km to mi - ANSWER: 1 km = 0.6214 mi
mi to m - ANSWER: 1 mi = 1609.34 m
L to qt - ANSWER: 1 L = 1.0567 qt
qt to L - ANSWER: 1 qt = 0.94635 L
ft^3 to L - ANSWER: 1 ft^3 = 28.317 L
oz to g - ANSWER: 1 oz = 28.349g
tbsp to mL - ANSWER: 1 tbsp = 14.787 mL
oz to grams (weight) - ANSWER: 1 oz = 28.35 g
Atom - ANSWER: Smallest particle of an element
chemical change - ANSWER: A change in matter that produces one or more new
substances
chemical property - ANSWER: behavior that is related to the change of one kind of
matter into another kind of matter
Compound - ANSWER: A pure substance made of two or more elements chemically
combined
Element - ANSWER: A pure substance made of only one kind of atom
Molecule - ANSWER: bonded collection of two or more atoms of the same or
different elements
physical change - ANSWER: A change in a substance that does not change its identity
Physical property - ANSWER: A characteristic of a pure substance that can be
observed without changing it into another substance
pure substance - ANSWER: homogeneous substance that has a constant composition
