Calcium-39 Undergoes Positron Decay

question 7

Multiple Choice

Calcium-39 undergoes positron decay. Each positron carries 5.49 MeV of energy. How much energy will be emitted when 0.0025 mol of calcium-39 decays?

• A) 13.2 kJ
• B) 1.32 × 10⁴ kJ
• C) 1.32 × 10⁶ kJ
• D) 1.32 × 10⁹ kJ
• E) none of the above

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Definitions:

Efferent Ductules

Tiny ducts leading away from the testicle that transport sperm from the rete testis to the epididymis.

Sustentacular Cells

Support cells found in various organs and tissues, providing physical support, nourishment, and regulation of cell environments.

Testosterone

A steroid hormone primarily produced in men by the testes and in women by the ovaries, responsible for the development of male secondary sexual characteristics.

Seminal Fluid

The fluid component of semen, produced by various male reproductive organs, providing nourishment and a medium for sperm during ejaculation.