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Chemistry

Which is the Lewis structure for H3PO4?Download png

Deborah Edwards

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A. Which statement accurately describes part of the dissolving process of a polar solute in water? B. Solute molecules repel water molecules. C. Water molecules surround solute molecules. D. Water molecules are strongly attracted to nonpolar substances. Solute molecules remain concentrated in one part of the solvent.

Kaitlin Dean

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Of the molecules sicl4 and sii4, which has bonds that are more polar?

Dana Keller

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What volume of a 1.0 m hcl is required to completely neutralize 25.0 ml of a 1.0 m koh?

Kristi Hammond

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Explain how the understanding of atomic emission spectrum led to development of the atomic theory? ( 4 points)

Jeremy Wood

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Find the separation of the 14n and 15n isotopes at the detector. express your answer with the appropriate units.

Donald Ward

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Magnesium nitrate contains chemical bonds that are A) covalent, only B) ionic, only C) both covalent and ionic D) neither covalent nor ionic

Curtis Rhodes

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As gravity makes an object fall down toward the ground, ____ energy becomes kinetic energy. A. Chemical B. Electromagnetic C. Potential D. Thermal

Roger Moore

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Determine the molar solubility of pbso4 in pure water. ksp (pbso4) = 1.82 x 10-8. a. 1.82 x 10-8 m b. 1.35 x 10-4 m

Theresa Perry

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Which energy position do electrons generally want to be in? the ground state the excited state the highest possible energy level the medium energy level

Deborah Edwards

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What does hund's rule state

Ronald Miller

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How many valence electrons does lithium (Li) have available for bonding? 1 2 3 4

Nicholas Rivera

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Which does not damage geothermal electricity-generating systems?

James Washington

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Rill erosion can eventually evolve into?

Whitney Matthews

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What is the wavelength of the line corresponding to n=4 in the balmer series? express your answer in nanometers to three significant figures?

Alexa Spicer

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For gamma radiation what stops its penetrating abilities

Brandon Scott

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What volume of 0.500 m h2so4 is needed to react completely with 20.0 ml of 0.400 m lioh?

Kristi Hammond

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A 1170 gram sample of nacl completely reacts, producing 460 grams Na what is the total mass of cl2 produced

Jeremy Wood

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Mixtures can be separated by filtration and distillation. Both methods take advantage of_______. A. differences in the chemical properties of the mixtures's components. B. differences in the physical properties of the mixture's components. C. similarities in the chemical properties of the mixture's components. D. similarities in the physical properties of the mixture's components

Deborah Edwards

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Calculate the concentration of so42− ions in a 0.010 m aqueous solution of sulfuric acid. express your answer to four decimal places and include the appropriate units.

William Cain

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Which of the following atoms would lose three electrons to empty its valence energy level? . A] Al B] S C] N, D] Sc.

Alexa Spicer

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The noble-gas notation for tin (Sn) will contain the symbol Ar Kr Xe Rn

Jennifer Patterson

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Which statement best describes the liquid state of matter? 1. It has definite shape but indefinite volume. 2. If has definite shape and definite volume. 3. It had indefinite shape and indefinite volume. 3. It had indefinite shape but definite volume.

Karen Wright

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Complete the lewis structures of the atoms and ions by adding electrons, as needed. a) Li B) Na C) Na+ D) F-

Deborah Edwards

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What is the molecular formula for an 18 carbon alkane

Kristi Hammond

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What is the best name for CaBr2?

Jodi Brooks

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Explain why humans cannot impact one of Earth’s systems without impacting the others

Rodney Fox

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What happens to colors in sunlight when droplets of water in the atmosphere act like prisms? A. dispersion B. polarization C. absorption D. interference

Justin Parker

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Why is a chemical equilibrium described as dynamic? Because maximum randomness has been achieved. Because the pressure and temperature do not change. Because both reactants and products continue to form. Because the concentrations of chemical species remain constant. Because the reactant and product molecules are in constant motion.

Deborah Edwards

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A carbonated drink is ____________ by the body because of the carbonation

Kathy Robinson

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Stable electron configurations are likely to contain ____. (1 point) A.filled energy sublevels B.fewer electrons than unstable configurations C.unfilled s orbitals D.electrons with a clockwise spin

Kyle Mckinney

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What is the oxidation number of iodine in KIO4?(1) +1 (3) +7(2) -1 (4) - 7

Kristi Hammond

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The modern-day quantum model of the atom is better than John Dalton’s model because it is easier to understand. is a more recent theory. can be represented in two dimensions. answers many questions about atoms.

William Cain

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Which of the following contains both ionic and covalent bonding? 1)CH4 2)NaCl 3)NH4Cl 4)N2O4

Victoria Fowler

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Which reaction is most likely to have a positive ΔSsys? Which reaction is most likely to have a positive ? 3NO2(g)+H2O(l)→2HNO3(l)+NO(g) CO(g)+Cl2(g)→COCl2(g) 6CO2(g)+6H2O(g)→C6H12O6(s)+6O2(g) 4NH3(g)+5O2(g)→4NO(g)+6H2O(g)

Roger Moore

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A. draw the structure of the tetrahedral intermediate initially-formed in the reaction shown. reactions of esters with

Alexa Spicer

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Which of the following factors can lead to desertification in the presence of natural drought? a. deforestation b. sustainable grazing c. underground mining d. all of the above

Jessie Thompson

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For each strong acid solutions, determine [h3o+],[oh−], and ph. 0.28 m hcl

Jennifer Patterson

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Foliated rocks are distinguished by ____.

Daniel King

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A kilogram is an SI unit. Which quantity might you measure in kilograms? temperature

Cynthia Baker

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Oxygen, sulfur, and tungsten are all examples of what type of matter? compound element heterogeneous mixture solution

Kristi Hammond

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Which expression is equal to the number of milliliters (mL) in 12.5 liters (L)?

Jodi Brooks

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Describe a polyhydroxyl alcohol.

Jennifer Patterson

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Which practice is harmful to the land? A) using animal waste as fertilizer B) Composting with peels from commercial fruit C) Throwing paint cans in the garbage D) Cutting the lawn with a gas-powered mower

Heather Maxwell

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? Which pair of molecules is not a polar bond? n – o c – o o – h o – o

Jeremy Wood

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Fusion is a type of _____. chemical reaction physical reaction nuclear reaction

Brandon Scott

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Compare the reactivity of alcohols with the length of the R-group.

Jessie Thompson

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In Klinefelter syndrome males have chromosomes XXY. This is an example of: a. Non-disjunction of sex chromosomes b. Crossing over c. Chromosomal rearrangement

Craig Stewart

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Which of the following statements is true for gas particles? A. They move freely and combine with each other. B. They don’t move at all. C. They move slowly and in a structured pattern. D. They are constantly in motion and changing position.

Kyle Mckinney

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Calculate the ratio of effusion rates of cl2 to f2 .

Ross Pratt

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