CHEMISTRY HIGH SCHOOL

Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?

Answers

Answer 1
Answer:

Answer is: C. Water can dissociate many ionic compounds through ion-dipole interactions.

For example, dissociation of potassium bromide: KBr(aq) → K⁺(aq) + Br⁻(aq).

Some ionic compounds cannot dissociate in water, for example calcium sulfate (CaSO₄), silver chloride (AgCl), lead(II)-carbonate (PbCO₃).

An ion-dipole is electrostatic interaction between a charged ion (cations and anions) and a molecule that has a dipole (in this example water).

Dipole is a separation of positive and negative charges. In water, hydrogen has positive and oxygen has negative charge.
Answer 2
Answer: It is called the universal solvent because it can dissolve a wide range of solutes. Generally speaking, water is good at dissolving ions and polar molecules, but poor at dissolving nonpolar molecules. Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure. The unequal charge distribution in a water molecule allows the interaction with ions.

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During an investigation, a student determines that a copper sample has a density of 8.10g/mL. What is the student's percent error if the a ccepted density for copper is 8.96g/mL?

Answers

p-percent\ error\n p=(|8.10-8.96|)/(8.96)*100\%=(0.86)/(8.96)*100\%=9.6\%

What is the velocity of a 500 kilgram elevator that has 4000 joules of energy?

Answers

Oct 15, 2016 - You'll have to use the formula to find kinetic energy, E=1/2*m*v^2 the ... input which is 4000 juoles, the mass is 500 kg and the velocity is what ...Kinetic/Potential Energy math problems? | Yahoo Answershttps://answers.yahoo.com/question/index?qid=20090326203307AACcKkzCachedSimilarMar 26, 2009 - You don't have to answer them all, only the one(s) you know. 1. What is the velocity of a 500 kilogram elevator that has 4000 Joules of energy?What is the velocity of a 800 kilogram elevator that has 3,560 ...May 19, 2013What is the velocity of an 500 kilogram elevator that has 4000 ...Jan 30, 2013What is the velocity of a 500 kg elevator that has 4,000 J of ...Oct 19, 2011can someone help me with a couple of science/math problems ...Nov 28, 2007More results from answers.yahoo.com[PDF]Ch. 11 Energy and Motion Review - Ms. Stalkermsstalker.weebly.com/uploads/3/2/1/1/.../ch.11_study_guide_review_answers.pdfCachedSimilarThe truck has greater kinetic energy because its ... Energy= joules. Weight= Newton ... What is the velocity of a 500-kg elevator that has 4000 J of energy?[DOC]Energy Problems (from combo page) - Midland ISDwww.midlandisd.net/cms/lib01/.../Energy%20Problems%20Gallery%20Walk.docCachedDetermine the amount of potential energy of a 5 N book that is moved to 3 ... What is the velocity of a 500 kg elevator that has 4000 joules of kinetic energy? Ans:.What is the velocity of an 500 kg elevator that has 4000 J of energywww.answers.com › ... › Categories › Science › Units of Measure › Weight and MassCachedSimilar1/2(500kg) • v^2 = 4000J V = √(4000÷250) = 4 m/s. ... 250 kg roller coaster car has 20000 J of potential energy at the top of the hill what is the velocity of the car at the ... KE = 1/2mV^2 300 Joules = 1/2(1500 kg)V^2 multiply through by 2 600 ...What is the velocity of an 500 kg elevator that has 4000 joules of energywww.answers.com › WikiAnswers › Categories › ScienceCachedSimilar500 joules is equal to 368.78 ft-lbf. For example, an object has 500 joules of kinetic energy, when its mass is 10 kg (~22 lbs) and it is traveling at 10 m/s (36 km/h ...What is the velocity of an 500-kilogram elevator that has 4000 joules of ...brainly.com › High School › PhysicsCachedMar 5, 2014 - ... is the velocity of an 500-kilogram elevator that has 4,000 joules of energy? ... Brainly has millions of high quality answers, all of them carefully ...Potential energy and Kinetic energy Flashcards | Quizlethttps://quizlet.com/151831434/potential-energy-and-kinetic-energy-flash-cards/CachedWhat is the kinetic energy of a 3-kilogram ball that is rolling at 2 meters per ... What is the velocity of an 500-kilogram elevator that has 4,000 joules of energy?Energy Problems Key.pdf - Owen J. Roberts School Districtojrsd.schoolwires.net/site/.../filedownload.ashx?...Energy%20Problems%20Key.pdfA description for this result is not available because of this site's robots.txtLearn more[PDF]Gravitational Potential Energy and Motional Kinetic _Enerqv Forms of ...www.mayfieldschools.org/.../Worksheet_MechanicalEnergy_2015_Solutions.pdfCachedSimilarmeasured in joules. ... kilograms) as well as the velocity or speed of that object. .... is the velocityiof a 500-kg elevator that has 4000 J of motional kinetic energy? .mfr{margin-top:1em;margin-bottom:1em}#brs{}#brs{margin-bottom:28px}#brs .med{color:#222;height:auto;padding-bottom:8px}.brs_col{font-size:14px;margin-top:-1px;padding-bottom:1px;display:inline-block;line-height:20px;vertical-align:top;max-width:100%;box-sizing:border-box}#brs ._e4b{margin:0;clear:both}#brs a{padding:3px 32px 3px 0;display:inline-block;float:left}#brs a{text-decoration:none}g-section-with-header{display:block;margin:40px 0}._ojo{padding:0 0px 12px 0px} Searches related to what is the velocity of a 500 kilogram elevator that has 4000 joules of energywhat is the mass of an object that creates 33,750 joules of energy by traveling at 30 m/sec?what is the mass of an object traveling at 30. m/s if it has 33,750 j of energy?what is the mass of an object traveling at 30m/s if it has 33 750 j of energywhat is the mass of an object that creates 33750 joules of energy by traveling at 30 m swhat is the mass of an object that creates 33 750 joules of energy by traveling at 30 m/secin a lab investigation one group of studentswhat is the kinetic energy of a 2,000-kilogram boat moving at 5 m/sec?what is the mass of an object that creates 33750 joules of energy by traveling at 30m/s

What is the work done when a volume increases from 3 litersto 5 liters at 6 atm of pressure? (Conversion factor: 1 L atm = 100))

Answers

Answer:

-1215.9J is the work done

Explanation:

It is possible to find work done in the change of volume of a gas at constant pressure using:

W = -P×ΔV

Where W is work, P is pressure and V is change in volume}

Replacing:

W = -6atm×(5L-3L)

W = -12atmL

As 1atmL = 101,325J, work done in joules is:

-12atmL ×(101.325J / atmL) = -1215.9J is the work done

The value of work done when a volume increases from 3 liters to 5 liters at 6 atm of pressure is -1215.9 Joules.

How do we calculate workdone?

Workdone on any boby or by the body will be calculated as:

W = -P×ΔV, where

W = workdone

P = applied or exerted pressure = 6 atm

ΔV = change in volume due to workdone = (5-3) L

Negative sign in the formula shows that work is done on the opposite side of the pressure or volume.

On putting all these values on the above equation, we get

W = -6atm × (5L-3L)

W = -12 atmL

We know that, 1 atmL = 101,325 J,

So, workdone in joules will be written as:

-12 atmL × (101.325J / atmL) = -1215.9 J

Hence, -1215.9 J is the workdone.

To know more about workdone, visit the below link:
brainly.com/question/18363506

What is the compound name for P4Br8

Answers

Tetra phosphorous octa bromide is the compound name for P4Br8.

What is compound?

A substance is from a combination of two or more different chemical elements. They are pure chemical substances found in nature.

  • The smallest unit of a compound is molecule.
  • Both phosphorous and bromide are on the right side of the periodic table.
  • Both phosphorous and bromide form covalent bond.
  • Atomic weight of phosphorous is 30.97 and atomic number is 15.
  • Atomic weight of bromine is 79.9 and atomic number is 35.

The name is tetra because there are 4 phosphorous and octa means there is 8 bromide.

The ratio of phosphorous and bromide is 4:8.

Tetra phosphorous octa bromide is the compound name for P4Br8.

Learn more about compounds here:

brainly.com/question/14658388

#SPJ6
These are both on the right side of the periodic table, so they bond covalently.The name would be TETRAphosphorous OCTAbromide. Tetra because there are 4 phosphorus molecules, and octa because there re 8 bromine molecules
Hope that helps!

Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck’s constant is 6.626 x 10-34 joule seconds, the speed of light is 2.998 x 108 m/s)

Answers

Answer:

The atom's energy will decrease by 8.99 x 10⁻²⁶ J.

Explanation:

The atom's energy will go down by an amount equal to the energy of the photon that it emits.

The energy E of a photon is inversely proportional to its wavelength according to the following equation, where h is Planck's constant and c is the speed of light:

E = (hc)/λ

We substitute the values into the equation to solve for the energy:

E = (hc)/λ = (6.626 x 10⁻³⁴ J·s)(2.998 x 10⁸ m·s⁻¹) / 2.21 m

E = 8.99 x 10 ⁻²⁶ J

Thus, the atom's energy will decrease by 8.99 x 10⁻²⁶ J.
  Energy of photon = h x f 
f = v/wavelength 
f = 3x10^8 / 2.21 = 1.357x10^8 
E = 8.99x10^-26 joules i hope i helped u

Hydrogen bonding is a type of(1) strong covalent bond
(2) weak ionic bond
(3) strong intermolecular force
(4) weak intermolecular force

Answers

Option 3. strong intermolecular force

Certain substances such as H2O, HF, NH3 from hydrogen bonds, and the formation of which affects properties (mp,bp,solubility) of substance. Other compounds containing OH and NH2 groups also form hydrogen bond. Molecules of many organic compounds such as alcohols, acids, amines, and amino acids contain these groups, and thus hydrogen bonding plays an important role in biological science.
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