What chemical compound is crucial to marine life and how is it disappearing?

Difference between emprical and molecular formula

Musya8 [376]

Answer:

The key difference between empirical and molecular formulas is that an empirical formula only gives the simplest ratio of atom whereas a molecular formula gives the exact number of each atom in a molecule.

3 0

2 years ago

Which of the following is formed by intense heat and pressure over millions of years?

kumpel [21]

Answer:

B:Metamorphic

Explanation:

Rocks formed under high heat and pressure is essentially the definition of metamorphic rock :)

8 0

3 years ago

7) Explain how tsunamis are formed. How do tsunamis change the surface of the Earth?

antiseptic1488 [7]

A tsunami is a series of waves generated in an ocean or other body of water by a disturbance such as an earthquake, landslide, volcanic eruption, or meteorite impact. The picture at the left shows how an earthquake can generate a tsunami in the overlying water.

By washing away large surfaces of land and depositing it in a different area. Also does damage to structures and deposits salt into the soil.

7 0

3 years ago

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

nirvana33 [79]

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

5 0

3 years ago

Calculate the standard reaction enthalpy for the reaction NO2(g) → NO(g) + O(g) given +142.7 kJ/mol for the standard enthalpy of

bulgar [2K]

Answer:

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

Explanation:

$O_2(g) \rightarrow \frac{2}{3}O_3(g),\Delta H^o_{1}=142.7 kJ/mol$ ..[1]

$O_2(g) \rightarrow 2 O(g),\Delta H^o_{2}=498.4 kJ/mol$ ..[2]

$NO(g) + O_3(g)\rightarrow NO_2(g) + O_2(g) ,\Delta H^o_{3} = -200 kJ/mol$ ..[3]

$NO_2(g)\rightarrow NO(g) + O(g),\Delta H^o_{4}=?$ ..[4]

Using Hess's law:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

2 × [4] = [2]- (3 ) × [1] - (2) × [3]

$2\times \Delta H^o_{4}=\Delta H^o_{2} -3\times \Delta H^o_{1}-2\times \Delta H^o_{3}$

$2\times \Delta H^o_{4}=498.4 kJ/mol-3\times 142.7 kJ/mol-2\times -200 kJ/mol$

$2\times \Delta H^o_{4}=470.3 kJ/mol$

$\Delta H^o_{4}=\frac{470.3 kJ/mol}{2}=235.15 kJ/mol$

The standard reaction enthalpy for the given reaction is 235.15 kJ/mol.

7 0

3 years ago