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Chemistry

How many atoms are in 0.075 mol of titanium?

James Washington

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When cool, dense air from over the water flows inland, it's called a ____. a. land breeze c. jet stream b. polar easterly d. sea breeze

Jodi Brooks

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Why are data organized into tables and graphs

Ramon Kelly

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Determine the ph of a 0.22 m naf solution at 25° c. the salt completely dissociates into na (aq) and f- (aq), and the na (aq) ion has not acid or base properties. the ka of hf is 3.5 × 10-5.

Ramon Kelly

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Which represents the ionization of a strong electrolyte? CH3OH(l) mc015-1.jpg CH3OH(aq) K3PO4(s) mc015-2.jpg 3K+(aq) + PO43–(aq) H2CO3(aq) mc015-3.jpg H+(aq) + HCO3–(aq) CH3COOH(aq) + H2O(l) mc015-4.jpg H3O+(aq) + CH3COO–(aq)

Annie Barnes

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We can determine the velocity of a wave when given the _______ and the wavelength. (2 points) frequency amplitude crest equilibrium

Ross Pratt

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C3H6(OH)2 major species present when dissolved in water

Kristi Hammond

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Which is the first step in the dissolving process? A.) The solute becomes like the solvent. B.) The solute molecules are carried into the solution. C.) The solvent molecules surround the solute particles. D.) The solvent molecules are attracted to particles at the surface of the solute.

Samantha Barber

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One characteristic of a scientific theory is that _______ a. it can never be proved b. it can be proved c. it cannot be modified d. it summarizes a set of observations

Kathy Robinson

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Compare and contrast O2 and F2

Kristi Hammond

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What are the properties of elements related to? A) the number of electrons that fill the outer shell B) an element's symbol C) the total number of electrons D) the average atomic mass

Chelsea Hayes

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There are three main types of mixtures. Which is a homogeneous mixture? Salt water contains small particles that have moved, so they are evenly spread through the mixture. Paint is composed of many colored particles that separate from the rest of the mixture when left in the can for a long time. Shaving cream is a mixture that contains small- to medium-sized particles suspended in foam.

Theresa Perry

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What leads to the formation of an ionic bond with Hg22+? a.the attraction of a noble gas b.the attraction of an NH4+ ion c.the attraction of a group 1 element d.the attraction of an SO42– ion

Cynthia Baker

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The amount of heat involved in the synthesis of 1 mole of a compound from its elements with all substances in their standard states at 25 degrees celcius is called

Nicholas Rivera

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A barium atom attains a stable electron configuration when it bonds with...

Theresa Perry

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The atmosphere's variable gases that most influence the greenhouse effect are _____. nitrogen and oxygen argon and carbon dioxide carbon dioxide and water vapor water vapor and ozone

Victoria Fowler

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The Bessemer process created strong, lightweight (1 point) steel. oil. iron. coal.

Ronald Miller

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Hydrogen fuel cells burn with _______ and produce _______. a. water, oxygen b. oxygen, water c. carbon dioxide, oxygen d. oxygen, carbon dioxide

Nicholas Rivera

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An atom has a mass number of 24 and 13 neutrons. What is the atomic number of this atom? Express

Whitney Matthews

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In water, HNO3 produces H+ ions. Which is the name for HNO3 in an aqueous solution? hydrogen nitrate nitric acid saltpetre nitrous acid

Blair Lewis

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Which of the following best describes the electron cloud model? A. It shows that electrons usually carry a negative charge. B. It shows that electrons remain in high-energy subshells. C. It shows that electrons move quickly in circular orbits. D. It shows that the electrons within an atom do not have sharp boundaries.

Timothy Norman

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What compound is the simplest aromatic compound? a. methane c. ethyne b. ethene d. benzene

Tara Andrews

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O2(g) effuses at a rate that is ______ times that of br2(g) under the same conditions.

Alexa Spicer

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Which term refers to a universal fact sometimes based on mathematical equations?

Karen Wright

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If people have trouble digesting fats, they most likely have trouble with __________. a. the esophagus and liver b. the pancreas and stomach c. the liver and gallbladder d. the small intestine and large intestine

Caroline Campbell

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Which statement is correct about the law of conservation of energy Energy is created when water freezes. Energy is destroyed when sugar is burned. Energy stays inside molecules permanently. Energy is transferred when atoms are rearranged

Roger Moore

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1. In addition to being necessary for respiration, _______ also provides UV radiation protection.

Alexa Spicer

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An arid or semiarid climate occurs where precipitation is greater than potential evaporation.

Alexa Spicer

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Which change results in the formation of different substances? (1) burning of propane (2) melting of NaCl (s) (3) deposition of CO2(g) (4) solidification of water

Dana Keller

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Which characteristics best identifies an arrhenius base ?

Kaitlin Dean

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Which of the following changes has a decrease in entropy? . A.hg N2O4 (g) 2NO2 (g) B.3O2 (g) + 2KCl (s) 2KClO3 (s) C.C2H5OH (l) + 3O2 (g) 2CO2 (g) + 3H2O (g) D.H2O (l) H2O (g)

Curtis Rhodes

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Oxygen dichloride (OCl2) 3d structure

Kevin Sutter

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Which statement correctly describes the relationship between reactant and yield? The actual yield is calculated from the amount of the excess reactant present. The actual yield is calculated from the amount of the limiting reactant present. The theoretical yield is calculated from the amount of the excess reactant present. The theoretical yield is calculated from the amount of the limiting reactant present.

Blair Lewis

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Write the chemical symbols for three different atoms or atomic anions with 17 electrons. site:answers..com

Carlton Burgess

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If a substance reacts with oxygen, the chemical reaction is most likely a combustion reaction. decomposition reaction. single replacement reaction. double replacement reaction.

Brandon Scott

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How many electrons are shared in the lewis structure of ch2cl2?

Ronald Miller

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Which of the following is not a result of air pollution? A. Smog B. Breathing problems C. Global warming D. Soil erosion

Annie Barnes

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There are no negative consequences to using nuclear energy. true or false

Kristi Hammond

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In a nuclear reaction, mass must be lost to produce energy. Please select the best answer from the choices provided T F

Melissa Norris

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From the following observations, identify the base. . 1. a solution conducts electricity and feels slippery. 2. a solution conducts electricity and reacts with metal. 3. a solution is sour and produces hydrogen gas. 4. a solution conducts electricity and forms salts

Roger Moore

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Proposing an explanation for the changing colors of the sky is an example of a(n)

Ronald Miller

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Which of the following materials is a substance? a. air b. gasoline c. stainless steel d. silver

Kevin Sutter

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Which formula equation represents the burning of sulfur to produce sulfur dioxide?

Dana Keller

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Which type of reaction is represented by the generic equation AB + CD mc002-1.jpg AD + CB?

Craig Stewart

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Calculate the ph of the resulting solution if 25.0 ml of 0.250 m hcl(aq) is added to(b) 35.0 ml of 0.300 m naoh(aq).

Jeremy Wood

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What must be part of a quantitative observation?

Kaitlin Dean

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Which type of graph is best for analyzing quantitative dependent and independent variables? a. line graph b. pie graph c. bar graph d. surface graph

Roger Moore

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H2, N2, O2 molecules. . . A)must be polar. must be nonpolar. . B)can be polar or nonpolar depending on geometric . C)configuration. . D)indeterminate

Ross Pratt

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Unlike a prokaryotic bacteria cell, a virus, like the one in the image, A) has a lipid cell wall. B) has no genetic material. C) cannot reproduce on its own. Eliminate D) does not contain any organic molecules.

Ross Pratt

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Draw the cis and trans isomers of 2-butene, ch3chchch3. show all hydrogen atoms.

Dana Keller

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