Exam One Review Questions (Pt.1)
round 0.000680483 to 4 significant figure
0.0006805
how many significant figures are in 0.001 ?
1
how many significant figures are in 5000 ?
1
1 kilogram equals how many grams ?
1000
0.03954 rounded to 0.040. how many significant figures was it rounded off to ?
2
how many significant figures are in 0.040 ?
2
how many significant figures are in 35000 ?
2
in the problem: (2.5 + 3.05) x 1.54 , the result would be rounded to how many significant figures ?
2
in the problem: 1.25 + 2.5 , the result would be rounded to how many significant figures ?
2
in the problem: 4.5 x 4.58 , the result would be rounded to how many significant figures ?
2
how many significant figures are 2.00 ?
3
how many significant figures are in 0.0250 ?
3
how many significant figures are in 1.23 x 10¹¹ ?
3
how many significant figures are in 2.00 ?
3
how many significant figures are in 2.08 ?
3
how many significant figures are in 20.0 ?
3
in the problem: 100.0 x 65.8 , the result would be rounded to how many significant figures ?
3
4.05438 rounded to 4.054. how many significant figures was it rounded off to ?
4
how many significant figures are in 0.003040 ?
4
how many significant figures are in 4023 ?
4
express 2.030 x 10⁻³ in standard notation a. 0.002030 b. 0.00203 c. 203000 d. 0.0203 e. 0.002
a
The smallest object that retains properties of an element. Composed of electrons and a nucleus (containing protons and neutrons).
atom
the number of protons in an element is also known as and is represented on the periodic table as what ?
atomic number
what is the metric relationship between grams (g) and micrograms (µg) ? a. 1g = 100 µg b. 1g = 1,000,000 µg c. 1g = 0.0000001 µg d. 1g = 1000 µg
b
which one of the following is a measurement of length in the SI metric system ? a. milliliter b. meter c. gram d. celsius
b
which one of the following is a measurement of temperature in the metric system ? a. gram b. celsius c. meter d. milliliter
b
which one of the following is most likely to be a heterogenous mixture? a. gasoline b. blood c. antifreeze (water and ethylene glycol) d. sodium chloride (table salt) dissolved in water e. the air trapped inside of an inflated balloon
b
all of the following are examples of intensive properties EXCEPT a. melting point b. color c. mass d. density e. boiling point
c
express 0.08010 in exponential notation a. 8.01 x 10⁻² b. 8.01 x 10² c. 8.010 x 10⁻² d. 8 x 10⁻² e. 8.010 x 10²
c
which one of the following examples illustrates a number that is correctly rounded to three significant figures? a. 4.05438 grams to 4.054 grams b. 103.692 grams to 103.7 grams c. 20.0332 grams to 20.0 grams d. 0.03954 grams to 0.040 grams e. 109,526 grams to 109,500 grams
c
which one of the following is a formula for solving for density ? a. D = M x V b. D = V/M c. D = M/V
c
which one of the following is most likely to be a homogenous mixture? a. blood b. ground beef c. the air trapped inside an inflated balloon d. chocolate chip cookies e. mortar (calcium carbonate and sand)
c
potassium reacting with water more quickly than calcium would be a comparison of what kind of property ? (physical/chemical)
chemical
what kind of property is the rusting of iron ?(physical/chemical)
chemical
A pure substance composed of two or more different elements
chemical compound
A substance formed by the reaction of two or more chemical elements. The elements in this are present in fixed ratios.
compound
The ability of a substance to allow the flow of energy or electricity
conductivity
which one of the following are extensive properties: mass, volume, and/or density ? a. mass only b. volume only c. density only d. mass and volume e. volume and density
d
does a milligram (increase/decrease) the value of a gram?
decrease
The mass of a substance divided by its volume equals ?
density
kg/m³ is the unit of what?
density
the ability of a substance to be drawn into thin wires is an intensive property referred to as ?
ductility
A substance consisting of atoms which all have the same number of protons (same atomic number)
element
a pure substance that is composed of only one type of atom
element
Properties that depend on the amount of matter present
extensive
all the physical properties below are all categorized as what property ? * mass * weight * volume * length
extensive
length is what type of property ? (intensive/extensive)
extensive
mass is what kind of property ? (intensive/extensive)
extensive
mass is what type of property ? (intensive/extensive)
extensive
volume is what type of property ? (intensive/extensive)
extensive
weight is what type of property ? (intensive/extensive)
extensive
how easily a substance can be scratched is an intensive property referred to as ?
hardness
a mixture that does NOT have uniform composition and properties throughout
heterogeneous mixture
a mixture which has uniform composition and properties throughout
homogeneous mixture
does a kilogram (increase/decrease) the value of gram ?
increase
Properties that do not depend on the amount of the matter present
intensive
all the physical properties below are all categorized as what property ? * color * conductivity * odor * hardness * luster * melting/freezing point * malleability * boiling point * ductility * density
intensive
boiling point is what type of property ? (intensive/extensive)
intensive
color is what kind of property ? (intensive/extensive)
intensive
conductivity is what type of property ? (intensive/extensive)
intensive
density is what type of property ? (intensive/extensive)
intensive
malleability is what type of property ? (intensive/extensive)
intensive
melting point is what kind of property ? (intensive/extensive)
intensive
physical properties of matter are categorized as either ₋₋₋₋₋₋ or ₋₋₋₋₋₋₋ ? (?;?)
intensive;extensive
An atom or a group of atoms that carries an electric charge
ion
occur when an element's atoms exist with different numbers of neutrons
isotopes
what is the standard unit of temperature in the SI metric system ?
kelvin
what is the standard unit of mass in the SI metric system ?
kilogram
what is the standard unit of volume in the SI metric system ?
liter
how shiny a substance is, is an intensive property referred to as ?
luster
the ability of a substance to be beaten into thin sheets is an intensive property referred to as ?
malleability
A measurement of the amount of matter in a object
mass
anything that has mass and occupies space
matter
chromium (metal/nonmetal)
metal
iron (metal/nonmetal)
metal
titanium (metal/nonmetal)
metal
zinc (metal/nonmetal)
metal
high melting points, high densities, thermal and electrical conductors are all the common properties of ?
metals
what is the standard unit of length in the SI metric system ?
meter
A collection of 6.02 x 10²³ number of objects thats usually used to average (mean) molecules
mole
Two or more atoms chemically combined
molecule
are zeros at the beginning of a decimal number considered significant ?
no
is a large number without a decimal point significant ?
no
is density an extensive property?
no
hydrogen in its metallic state (metal/nonmetal)
nonmetal
ethylene glycol (antifreeze) is more viscous than water is a comparison of what kind of property ? (physical/chemical)
physical
gold is more malleable than titanium would be a comparison of what kind of property ? (physical/chemical)
physical
the electrical conductivity of aluminum is greater than copper would be a comparison of what kind of property ? (physical/chemical)
physical
the melting point of gold is what kind of property ? (physical/chemical)
physical
what kind of property is the conductivity of copper wire ? (physical/chemical)
physical
what kind of property is the viscosity of motor oil ?(physical/chemical)
physical
A change in which a substance changes from one physical state to another but no substances with different composition are formed (ex. gas to liquid; solid)
physical change
A property that can be measured without changing the chemical composition of a substance
physical property
what is the standard unit of time in the SI metric system ?
second
A measurement of the amount of space a substance occupies
volume
a measurement of the gravitational force of attraction of the earth acting on an object is an extensive property referred to as ?
weight
are zeros at the end of a decimal number considered significant?
yes
are zeros between nonzero digits considered significant ?
yes
is a no zero number considered significant ?
yes
is the coefficient of a number written in scientific notation considered significant ?
yes
