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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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