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Chemistry

Which type of radiation is the smallest in size?

Caroline Campbell

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Which activity most likely involves the direct use of saturated hydrocarbons?

Ashley Howard

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What is the total number of electrons in a Mg2+ ion?(1) 10 (3) 14 (2) 12 (4) 24

Samantha Barber

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What is the mass of 3.8 × 1024 atoms of argon (Ar)?

Theresa Perry

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Find the atomic numbers of the as yet undiscovered next two members of the series. radon

Cynthia Baker

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Which reason best explains why plasmas are good conductors of electricity? They have mobile charged particles. They are at extremely high temperatures. They are made up of particles in fixed positions. They have slow-moving nuclei that carry electricity.

Heather Maxwell

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When is di- used in the name of a hydrocarbon? when the main chain contains two carbon atoms when there are two different substituents when there are two main chains of equal length when there are two identical substituents

James Washington

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What is the effect of the repetition of the word “dead” in this line?

Curtis Rhodes

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What are homogeneous mixtures of metals commonly called?

Theresa Perry

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A cubic meter is about the same as the volume occupied by a _____. basketball arena kilogram of water washing machine cup of milk

Brandon Scott

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"how many grams of sucrose (c12h22o11) are in 1.55 l of 0.758 m sucrose solution"

Zach Chandler

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Which of these groups includes organisms that are MOST closely related? A) class B) family C) genus D) species

Donald Ward

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Ions are charged particles. Therefore, ions must always have an unequal number of

Rodney Fox

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The practice of plowing fields along the curves of a slope is called?

Megan Page

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Which of the following metals will react with water to produce a metal hydroxide and hydrogen gas? Mg Li Al Pb

Ronald Miller

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An organic molecule will always contain _____. carbon carbon and hydrogen hydrogen O, H, and C

Deborah Edwards

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Which of the following elements are good insulators? Li and Ca Ag and Au P and S Th and U

Nicholas Rivera

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Classify these bonds as ionic, polar covalent, or nonpolar covalent p cl k br c c

Kathy Robinson

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A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it? K Zr Ca Sc

Justin Parker

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Which one of the following substances is a liquid fuel used in rocket engines? a. Potassium perchlorate b. Liquid oxygen c. Ammonia d. Codium nitrate

Tara Andrews

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Which compound most likely contains polar covalent bonds?

Blair Lewis

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Which of the following stars is the coolest? Sirius, a type A star Arcturus, a type K star Spica, a type B star Antares, a type M star

Cynthia Baker

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Which element is likely to be the most brittle

Cynthia Baker

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When molten rock undergoes crystallization above ground, what type of rock results? a. intrusive igneous rock b. extrusive igneous rock c. metamorphic rock d. sedimentary rock

Dana Keller

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A space probe identifies a new element in a sample collected from an asteroid. Successive ionization energies (in attojoules per atom) for the new element are shown below. I1 I2 I3 I4 I5 I6 I7 0.507 1.017 4.108 5.074 6.147 7.903 8.294 To what family of the periodic table does this new element probably belong? 1(1A) 2(2A) 13(3A) 14(4A) 15(5A) 16(6A) 17(7A) 18(8A)

William Cain

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Earth is divided into 24? A) equators B) coordinates C) degrees D) time zones

Ross Pratt

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Which changes can reach dynamic equilibrium? 1. nuclear changes, only 2. chemical changes, only 3. nuclear and physical changes 4. chemical and physical changes

Annie Barnes

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Which of the following elements does not form a monatomic ion? A.potassium B.sulfur C.chlorine D.xenon

Samantha Barber

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How many n2o4 molecules are contained in 76.3 g n2o4? the molar mass of n2o4 is 92.02 g/mol?

Ashley Howard

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Draw the Lewis Dot structure for RbIO2.

Cynthia Baker

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Choose the bond below that is most polar. choose the bond below that is most polar. h-cl h-br h-i c-h h-f

Alexa Spicer

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How are anthropologists able to make generalizations about human behavior? A.by studying isolated groups of people B.by researching the archaeological debris of different societies C.through knowing the regularities in human custom

Annie Barnes

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What is the mole ratio of NH3 to N2?

Chelsea Hayes

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Rank these compounds by their expected boiling point? CH4 CH3Cl CH3OH? Lowest to highest; 10+ for the best explanation. Thank you. CH3Cl low 11.56 F boiling point CH3OH med 149 F boiling point CH4 257.8 F boiling point all these were wrong.

Deborah Edwards

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The jovian planets contain large abundances of hydrogen and helium because

Kyle Mckinney

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What is the volume occupied by 51.0 g of ammonia gas (nh3) at stp?

Eric Morgan

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Which is the correct Lewis dot structure of NH2-? Download jpg

Dana Keller

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Write the complete balanced equation for the reaction between FeCl3 and MgO

Jeremy Wood

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Which describes an alkaline solution? pH less than 7 pH equal to 7 basic acidic

Ralph Lopez

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The job outlook for physical therapists A) is weak to very poor. B) depends on the economy. C) will remain stable. D) will improve over time.

Jodi Brooks

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The formula of a compound indicates all of the following except: the symbols for the atoms the number of atoms the ratio of atoms in a compound the arrangement of the atoms in the molecule

Theresa Perry

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A 3.0 L solution contains 73.5 g of H2SO4. Calculate the molar concentration of the solution. I got .25M Approximately how much water must be added to the 3.0 L solution to dilute it to 0.18 M?

Mindee Nelson

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What dissolved species are present in a solution of kcn?

Kathy Robinson

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Which of the following best describes a pair of elements that will form an ionic bond? C and H: Hydrogen easily loses electrons, and carbon gains them. Li and O: Oxygen easily loses electrons, and lithium gains them. P and Cl: Phosphorus easily loses electrons, and chlorine gains them. Ca and Br: Calcium easily loses electrons, and bromine gains them

Deborah Edwards

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Which of the following can be used to neutralize an ammonia (NH3) solution? (3 points) Question 5 options: 1) NaCl 2) H2O 3) HNO3 4) Ca(OH)2

Timothy Norman

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Which element is the reducing agent in this reaction? 2KMnO4+3Na2SO3+H2O→2MnO2+3Na2SO4+2KOH

Ashley Howard

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The three men Crassus, Pompey, and Caesar joined together as a __________ to lead the empire. friends Senate Republic triumvirate

Ralph Lopez

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In this redox reaction, identify the reducing agent. 2Li + F2 2LiF

Ramon Kelly

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