An injection containing 15.0 pg 10 5B was injected into a patient suffering from

Question

An injection containing 15.0 pg 10  5B was injected into a patient suffering from a brain tumor. The patient was irradiated by a neutron gun at the site of the tumor. Calculate the amount of energy released in megaelectronvolts given that 931 MeV is released for each 1 amu mass defect.

To calculate the energy released, consider the isotopic masses as follows:

Express your answer in megaelectronvolts to three significant figures.

Element or particle Isotopic mass
(amu) 10  5B 10.0129 neutron 1.0086 73Li 7.0160 alpha particle 4.0026

Explanation / Answer

massdefect = m produts - m reactants

dm = (7.0160 +4.0026) - (10.0129 +1.0086)

dM = -0.0129

E = dM * 931.5 MeV

E = 0.0129* 931.5 MeV

E = 12.016 M eV

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---