Subject | Chemistry

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JG

Jeanet Garcia

1 day ago

What is heat?

A) A mass form transferred from object to object upon contact
B) An energy form transferred from object to object upon contact
C) A mass-energy transfer when hot and cold objects come into contact
D) An energy form transferred from hot to cold objects when they come in contact with each other

SF

Sierra Flore

1 day ago

What technique is often coupled with a radioimmunoassay to determine that a drug is present in a person?

A) Thin layer chromatography / mass spectrometry
B) Gas chromatography
C) Gas chromatography / mass spectrometry
D) Mass spectrometry

LS

Latoya Scott

1 day ago

In what source did Becquerel discover radioactivity?

A) In soil samples he examined
B) In minerals he was studying
C) In an explosive he was researching
D) In phosphorescent plant materials

KG

Kiirt Giosk

1 day ago

Why has arsenic been a "favorite" poison throughout history?

SL

Silupe Lanier

1 day ago

What is the name and condensed structural formula of the simplest alkene?

A) Ethene, CH₂=CH₂
B) Ethane, CH₂=CH₂
C) Ethene, CH₃CH₃
D) Ethane, CH₃CH₃

CC

Canion Cavazos

1 day ago

What is the purpose of the drug atorvastatin?

A) It lowers blood pressure.
B) It corrects erectile dysfunction.
C) It lowers drug serum cholesterol.
D) It is a by-product of Lipitor production.

GS

Gurlivleen Singh

1 day ago

What trend do the noble gases display in relation to electronegativity?

A) Electronegativity decreases as one goes down the noble gas column.
B) Electronegativity increases as one goes down the noble gas column.
C) The noble gases are all considered to have zero electronegativity.
D) For this column, there is no trend in electronegativity differences.

JC

Jared Casey - Holland

1 day ago

The penetrating power of ionizing radiation refers to what?

A) How far particles can penetrate into bodily tissue and cause damage
B) The depth to which particles can penetrate known standards of plant material
C) The depth to which particles can penetrate known standards of animal material
D) None of the above

KB

Kayla Bryfogle

1 day ago

What is the symbol for an equilibrium reaction?

A) =
B) ←
C) →
D) ⇌

AP

Adrian Perry

1 day ago

The reduction of any atom ends in an oxidation state of zero.

MM

Matthew Madden

1 day ago

What is the heat of fusion?

A) The heat needed to melt a solid completely.
B) The heat required to join two metals.
C) The heat needed to separate two metals.
D) The heat required to melt a fuse.

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RA

Randy Aceituno

1 day ago

Why does a small equilibrium constant indicate an equilibrium that lies mostly on the products side of a reaction?

A) Because the product concentrations are high
B) Because the reactant concentrations are low
C) Because the value of the products divided by the reactants is high
D) It doesn't; rather, it indicates an equilibrium that lies mostly on the reactants side of the equation.

AG

Aaron Guerra

1 day ago

In the reaction: N₂ + 3 H₂ ⇌ 2 NH₃, the equilibrium constant is very small, yet ammonia (NH₃) is readily produced. What conditions might be applied to make this happen?

A) A catalyst is added.
B) Product is removed as soon as it is formed.
C) All of the above.
D) None of the above.

HV

Haven Voorhees

1 day ago

What fraction of crude oil refinement is the gasoline fraction?

A) C1 to C4
B) C5 to C10
C) C10 to C16
D) C14 to C20

SV

Sergii Voloshchuk

1 day ago

According to collision theory, why must particles have a high energy?

A) To enhance the energy of the system
B) To increase the probability of particle motion
C) To orient correctly
D) To collide effectively

KJ

kenyana jones

1 day ago

What is a bomb calorimeter?

MF

Mitch Fenton

1 day ago

What is a beta particle?

TN

Tamia Nguyen

1 day ago

The molecular formula for the simplest alkyne is C₂H₄.

EA

Ethan Ainley

1 day ago

When discussing radiation, what is the definition of "half-life"?

A) The time required for ½ of an original amount of isotope to undergo radioactive decay
B) The time required to induce ½ of an original amount of isotope to undergo radioactive decay
C) The time required for ½ of an original amount of isotope to undergo chemical decay
D) The time required to induce ½of an original amount of isotope to undergo chemical decay

YS

Yohanna Sanchez

1 day ago

What does a value of 1.50 × 10⁴ for an equilibrium constant indicate about the reaction?

A) The equilibrium lies far to the reactants side.
B) The equilibrium is roughly equal amounts of products and reactants.
C) The equilibrium lies far to the products side.
D) The number does not indicate anything about the equilibrium.

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