Post Utme Abu 2019 Chemistry Question 7

Practice objective / multiple choice question 7 from the 2019 Post Utme Abu Chemistry examination.

Post Utme Abu 2019 Chemistry Objective / Multiple Choice

Question 7 POST_UTME_ABU • 2019 • CHEMISTRY • objective

The half-life \( t1/2 \) of a radioactive subs\tance is given by the equation: t1/2 = ln(2) * \sigma / \( \mu * c^2 \), where \sigma is the cross-sectional area, \mu is the mass density, and c is the speed of light. If the half-life is 10 years, the cross-sectional area is 1.0 x 10^\( -20 \) m^2, the mass density is 1.0 x 10^3 kg/m^3, and the speed of light is 3.0 x 10^8 m/s, calculate the mass density \( \mu \).

Correct Answer A. 1.0 x 10^\( -3 \) kg/m^3

B. 1.0 x 10^\( -2 \) kg/m^3

C. 1.0 x 10^\( -1 \) kg/m^3

D. 1.0 x 10^0 kg/m^3

Correct Answer

Correct Option:

1.0 x 10^\( -3 \) kg/m^3

This is Post Utme Abu 2019 Chemistry Question 7. It is one of the objective questions from the 2019 Post Utme Abu Chemistry examination.

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