Answer:
0.0002949 moles
Explanation:
Concentration = 2.02×10−2 M
Volume = 14.6 mL = 0.0146 L (Upon converting to litres)
Number of moles = ?
These variables are related by the fllowing equation;
Concentration = Number of moles / Volume
Number of moles = Concentration * Volume
Number of moles = 2.02×10−2 * 0.0146 = 0.0002949 moles
Lewis had proposed that the valence electrons of any substance were arranged around its atoms in a cubic configuration. Later on, this was modified when it was learned that the electrons actually orbit the nucleus, similar to the planets orbiting the sun. Moreover, it is now deduced that the electrons are found in regions, known as electron clouds, and their specific, discrete location at a given point in time can not be determined.
Answer is: 1130 microliters must be administered.
activity(selenium-75) = 2.3 mCi/mL.
radioactivity(Se-75) = 2.6 mCi; mCi is millicurie.
The curie (symbol: Ci) is a non-SI unit of radioactivity.
V(Se-75) = radioactivity(Se-75) ÷ activity(Se-75).
V(Se-75) = 2.6 mCi ÷ 2.3 mCi/mL.
V(Se-75) = 1.13 mL; volume.
V(Se-75) = 1.13 mL · 1000µL/mL.
V(Se-75) = 1130 µL.
