The potential energy curve below is for two nuclei undergoing fusion. As the nuclei approach, the potential energy initially increases and then decreases. Why does it initially increase? PE r
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- 7.86 Nitrogen triiodide, NI3(s) , is unstable and will spontaneously detonate to form a bright purple cloud of nitrogen and iodine gases accompanied with a loud ‘bang,” which suggests a release of energy. Considering the bonds involved, explain why this reaction is energy.c. Plutonium-238 is used in spacecraft to provide heat to power generators. One of thesegenerators contained 765 g of plutonium-238 when it was manufactured. Given that thehalf-life of plutonium-238 is 87.7 years, calculate the mass of plutonium-238 remainingafter 350.0 years.Plutonium-238 is used in spacecraft to provide heat to power generators. One of thesegenerators contained 765 g of plutonium-238 when it was manufactured. Given that thehalf-life of plutonium-238 is 87.7 years, calculate the mass of plutonium-238 remainingafter 350.0 years.
- The fusion of one H-3 atom and one H-1 atom producesThe combustion of hydrogen to form one mole of gaseous water has been experimentally determined to release 241.8 kJ of energy.Scientists can determine the age of ancient objects by a method called radiocarbondating. The bombardment of the upper atmosphere by cosmic rays converts bitrogen toa radioactive isotope of carbon, C-14, with a half-life of about 5730 years. Vegetationabsorbs carbon dioxide through the atmosphere and animal life assimilates C-14 throughfood chains. When a plant or animal dies it stops replacing its carbon and the amount ofC-14 begins to decrease through radioactive decay. Therefore, the level of radioactivitymust also exponentially decay. A parchment fragment was discovered that had about74% as much C-14 radioactivity as does plant material on the earth today. Estimate theage of the parchment.
- For the following reaction, what is the energy released, in GJ/mol? (1 GJ = 1E9 J) Use 2.998E8 m/s as the speed of light 1 a m u has a mass of 1.6605E-27 kg A + 1n → C + D A n C D mass (amu) 6.1679 1.0087 3.0792 4.0358Consider the following data for chromium: atomic mass 51.996gmol electronegativity 1.66 electron affinity 64.3kJmol ionization energy 652.9kJmol heat of fusion 20.5kJmol You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release →1Crg+Cr+ge− absorb Can't be decided with the data given. Is it possible to calculate the amount of energy absorbedor released by reaction (1) using only the data above? yes no If you answered yes to the previous question, enter theamount of energy absorbed or released by reaction (1): /kJmol Does the following reaction absorb or release energy? release →2+Crge−Cr−g absorb Can't be decided with the data given. Is it possible to calculate the amount of energy absorbedor released by reaction (2) using only the data above? yes no If you answered yes to…radioactive isotopes most commonly decay by emitting an alpha or betaparticle. In most decay processes, the product instantly relaxes to a more stable nuclearconfiguration by emitting a gamma ray, and thus the alpha or beta radiation is accompanied bysimultaneous gamma radiation. However, in the case of barium-137 (produced by a beta decayprocess), this relaxation takes longer, and thus the gamma decay can be observed as a reactionon its own. The reaction is represented by:137Ba* --> 137Ba + γwhere the * denotes a high energy state.Most radioactive decay obeys first order kinetics and therefore the half-life of a radioisotope isindependent of its concentration. In this experiment, you will be studying the decay ofmetastable barium-137 to determine if it is in fact first order. Once the order of the reaction isknown, you can calculate the rate constant and, if it is first order, the half life. The Geiger counter provides a running total of all the decay events that it detects.…
- radioactive isotopes most commonly decay by emitting an alpha or betaparticle. In most decay processes, the product instantly relaxes to a more stable nuclearconfiguration by emitting a gamma ray, and thus the alpha or beta radiation is accompanied bysimultaneous gamma radiation. However, in the case of barium-137 (produced by a beta decayprocess), this relaxation takes longer, and thus the gamma decay can be observed as a reactionon its own. The reaction is represented by:137Ba* --> 137Ba + γwhere the * denotes a high energy state.Most radioactive decay obeys first order kinetics and therefore the half-life of a radioisotope isindependent of its concentration. In this experiment, you will be studying the decay ofmetastable barium-137 to determine if it is in fact first order. Once the order of the reaction isknown, you can calculate the rate constant and, if it is first order, the half life. The Geiger counter provides a running total of all the decay events that it detects.…Why is the alpha particle choosen as the agent for the spontaneous carrying away of positive charge?Estimate the decay of carbon (Precalculus 1)