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33 solutions

Mass Defect

Q. The overall reaction taking place during a hydrogen burning in a young star is. How much energy in Mev is released per He nucleus formed? How much energy in MeV is released per mole of He?

Solved • Dec 11, 2019

Mass Defect

Q. An atom of 186Ta has a mass of 185.958540 amu. Calculate the mass defect (deficit) in amu/atom. (a) 1.591 (b) 1.442 (c) 1.482 (d) 7.97 (e) 0

Solved • Dec 11, 2019

Mass Defect

Q. Consider the following reaction: Pu-239 + 2 n → Pu-41. If you said energy was released or absorbed calculate how much energy is released or absorbed in kJ/mol and in MeV. Round each of your answers to 3 significant digits.

Solved • Dec 10, 2019

Mass Defect

Q. Consider the following reaction: Al + He → P + n. If you said energy was released or absorbed calculate how much energy is released or absorbed in kJ/mol and in MeV. Round each of your answers to 3 significant digits.

Solved • Dec 10, 2019

Mass Defect

Q. The half-life of a positron is very short. It reacts with an electron, and masses of both are converted into γ-ray photons. This reaction is called an annihilation reaction. The mass of an electron or positron is 9109×10-31 kg (a) Calculate the energy produced by the reaction between one electron and one positron. (b) Assuming that two γ-ray photons have the same frequency, calculate this frequency.

Solved • Dec 8, 2019

Mass Defect

Q. Calculate the nuclear binding energy in mega electronvolts (MeV) per nucleon for 205Tl. 205 Tl has a nuclear atomic mass of 204.974 amu

Solved • Dec 6, 2019

Mass Defect

Q. Precise measurements give the following masses: Now consider the following reaction: 238/92U -> 234/90 Th + 4/2He. Is energy released or absorbed by the reaction? 2. If you said energy was released or absorbed calculate how much energy is released or absorbed. Give your answer in both kJ/mol and MeV in 3 significant figures.

Solved • Dec 2, 2019