The activity of radio-labeled sodium iodide sample made from Iodine-131 at the time of accidental exposure, in the unit Ci / g , is to be calculated when its activity after 28 days is 25.6 × 10 − 5 Ci/g . Concept Information: The isotope of iodine is iodine-131 that emits radiation. This isotope is used in medicinal purposes as the bloodstream absorbs it in the gastrointestinal tract, gets concentrated in the thyroid gland and gland’s cell are destroyed by it. The relation between concentration and time in exponential form for a first-order reaction is given by the following equation: [ A ] = [ A ] 0 e − k t So, the half-life for a first-order reaction is given as, t 1 / 2 = ln 2 k = 0.693 k

Question

Want to see the full answer?

Answer 1

Question

Chapter 20, Problem 95RQ

Interpretation Introduction

Interpretation:

The activity of radio-labeled sodium iodide sample made from Iodine-131 at the time of accidental exposure, in the unit Ci/g, is to be calculated when its activity after 28 days is 25.6×10−5 Ci/g.

Concept Information:

The isotope of iodine is iodine-131 that emits radiation. This isotope is used in medicinal purposes as the bloodstream absorbs it in the gastrointestinal tract, gets concentrated in the thyroid gland and gland’s cell are destroyed by it.

The relation between concentration and time in exponential form for a first-order reaction is given by the following equation:

[A]=[A]0e−kt

So, the half-life for a first-order reaction is given as,

t1/2=ln2k=0.693k

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

9. OA. Rank the expected boiling points of the compounds shown below from highest to lowest. Place your answer appropriately in the box. Only the answer in the box will be graded. (3) points) OH OH بر بد بدید 2 3

There is an instrument in Johnson 334 that measures total-reflectance x-ray fluorescence (TXRF) to do elemental analysis (i.e., determine what elements are present in a sample). A researcher is preparing a to measure calcium content in a series of well water samples by TXRF with an internal standard of vanadium (atomic symbol: V). She has prepared a series of standard solutions to ensure a linear instrument response over the expected Ca concentration range of 40-80 ppm. The concentrations of Ca and V (ppm) and the instrument response (peak area, arbitrary units) are shown below. Also included is a sample spectrum. Equation 1 describes the response factor, K, relating the analyte signal (SA) and the standard signal (SIS) to their respective concentrations (CA and CIS). Ca, ppm V, ppm SCa, arb. units SV, arb. units 20.0 10.0 14375.11 14261.02 40.0 10.0 36182.15 17997.10 60.0 10.0 39275.74 12988.01 80.0 10.0 57530.75 14268.54 100.0…

A mixture of 0.568 M H₂O, 0.438 M Cl₂O, and 0.710 M HClO are enclosed in a vessel at 25 °C. H₂O(g) + C₁₂O(g) = 2 HOCl(g) K = 0.0900 at 25°C с Calculate the equilibrium concentrations of each gas at 25 °C. [H₂O]= [C₁₂O]= [HOCI]= M Σ M