The Law of Conservation of Mass
The statement, “In a chemical reaction, matter is neither created nor destroyed” is called
AThe Law of Conservation of Mass
BDalton’s atomic theory
Cthe Scientific Method
DThe law of Multiple Proportions
Dalton’s Atomic Theory states
Athat all elements have stable isotopes
Bthat matter is composed of small indestructible particles
Cthat the properties of matter are determined be the properties of atoms
Dthat energy is neither created or destroyed during a chemical reaction
Identify a liquid
Adefinite volume and definite space
Bdefinite volume and no definite shape
Cdefinite shape and no definite volume
Dno definite shape and no definite volume
A substance that can’t be chemically broken down into simpler substances is
Aa homogeneous mixture
Ban element
Ca heterogeneous mixture
Da compound
A substance composed of two or more elements in a fixed, definite proportion is
Aa homogeneous mixture
Ba heterogeneous mixture
Ca compound
Da solution
A physical change
Aoccurs when iron rusts
Boccurs when sugar is heated into caramel
Coccurs when glucose is converted into energy within our cells
Doccurs when water is evaporated
A chemical change
Aoccurs when methane is burned
Boccurs when paper is shredded
Coccurs when water is vaporized
D occurs when salt is dissolved in water
Define kinetic energy
Aenergy associated with the temperature of an object
Benergy associated with the motion of an object
Cenergy associated with the force of an object
Denergy associated with the gravity of an object
The outside temperature is 35 C. What is the temperature in K?
A-238 K
B308 K
C95 K
D31 K
What answer should be reported, with the correct number of significant figures, for the following calculation? (433.621 – 333.9) X 11.900
A1.19 X 103
B1.187 X 103
C1.1868 X 103
D1.18680 X 103
Water is an example of
Aa compound
Ban element
Ca heterogeneous mixture
Da homogeneous mixture
Kelvin is a measure of
Atemperature
Bmass
Ctime
Dlength
The factor 0.01 corresponds to which prefix?
Adeka
Bdeci
Ccenti
Dmilli
If the temperature is 228°F, what is the temperature in degrees Celsius?
A442.4°C
B501°C
C108.9°C
D–45°C
The outside air temperature is 40°F, what is the temperature in Kelvin?
A313 KB
377 K
C281 K
D277 K
Identify the description of an atom.
Aneutrons and electrons in nucleus: protons in orbitals
Bneutrons in nucleus; protons and electrons in orbitals
Cprotons and neutrons in nucleus; electrons in orbitals
Dprotons and electrons in nucleus; neutrons in orbitals
The mass number is equal to
Athe sum of the number of the electrons and protons
Bthe sum of the number of the neutrons and electrons
Cthe sum of the number of protons, electrons and neutrons
Dthe sum of the number of protons and neutrons
The atomic number is equal to
Athe number of the protons
Bthe sum of the number of the neutrons and electrons
Cthe sum of the number of protons, neutrons and electrons
Dthe sum of the number of protons and neutrons
What element is defined by the following information?
p+ = 20 n° = 20 e– = 20
Azirconium
Bcalcium
Cpotassium
Dneon
Give the symbol for silver
AS
BSi
CAr
DAg
Ions differ in the number of
Aelectrons
Bneutrons
Cprotons
Dneutrons and protons
Predict the charge that an ion formed from nitrogen would have
A1-
B6+
C3-
D3+
The atomic mass for cadmium is
A48
B112.41
C40.08
D20
How many moles of Kr are contained in 398 mg of Kr?
A4.75 X 10-3 moles Kr
B33.4 moles Kr
C2.11 X 10-4 moles Kr
D2.99 X 103 moles Kr
How many iron atoms are contained in 354 g of iron?
A2.62 X 1025 Fe atoms
B2.13 X 1026 Fe atoms
C4.69 X 1024 Fe atoms
D3.82 X 1024 Fe atoms
An atom of 25Mg contains ________ electrons.
A25
B37
C13
D12
How many neutrons are in manganese-54?
A25
B30
C29
D29.4
Identify an anion
Aan atom that has lost an electron
Ban atom that has gained an electron
Can atom that has lost a proton
Dan atom that has a neutron and a proton
How many electrons does the Se2-ion possess?
A32
B36
C4
D34
Give the number of protons in P3-
A18
B12
C19
D15
Which of the following elements is a metal?
ASb
BO
CBr
DAg
Which of the following elements is a halogen?
APo
BS
CI
DSn
Which of the following elements has chemical properties similar to tellurium?
Abromine
Blithium
Cnitrogen
Dsulfur
How many moles of potassium are contained in 200g of potassium?
A5.11 moles
B0.956 moles
C13.3 moles
D10.53 moles
Which of the following is equal to exactly i mole of atoms?
A6.00 g of carbon
B30.69 g of nickel
C12.01 g of carbon
D12.31 g of magnesium
An ionic bond is best described as
Athe sharing of electrons
Bthe transfer of electrons from one atom to another
Cthe attracton that holds the atoms together in a polyatomic ion
Dthe attraction between two nonmetal atoms
Give the name for SnO
Atin(I) oxide
Btin(II) oxide
Ctin(III) oxide
Dtin(IV) oxide
Give the name for KMnO4
Apotassium manganese tetraoxide
Bpotassium manganate
Cpotassium permanganate
Dpotassium permagnessium
Write the formula for copper (II) sulfate pentahydrate.
A Cu2SO3•H5
BCu2S•H2O
CCuS•5H2O
DCuSO4•5H2O
Give the name for P4O10
Aphosphorus(IV)oxide
Bdiphosphorus pentoxide
Cphosphorus oxide
Dtetraphosphorusdecoxide
Calculate the molar mass of Ca3(PO4)2
A87.05 g/mol
B215.21 g/mol
C310.18 g/mol
D279.21 g/mol
Calculate the mass percent composition of lithium in Li3PO4
A26.75%
B17.98%
C30.72%
D55.27%
Determine the molecular formula of a compound that has a molar mass of 183.2 g/mol and an empirical formula of C2H5O2.
AC2H502
BC6H15O6
CC3H7O3
DC4H10O4
Determine the empirical formula for a compound that is 36.86% N and 63.14% O by mass.
ANO
BN2O
CNO2
DN2O3
Identify the compound with ionic bonds
ANe
BCO
CKCl
DH2O
Which of the following is a molecular compound?
AKCN
BLiOH
CP4O10
DZnS
Which of the following exists as a diatomic molecule?
Aoxygen
Bcarbon
Clithium
Dkrypton
Identify the element that only exists as 2+
Acalcium
Bcesium
Clead
Dcarbon
Write the formula for the compound formed between aluminum and sulfur
AAl2S3
BAl3S
CAlS3
DAl2S
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