How much sodium was present in the sample

Assignment Help Chemistry
Reference no: EM131011317

Natural sodium consists entirely of the isotope 23Na whose cross section for thermal neutron capture is 0.53 b. When 23Na absorbs a neutron, it becomes 24Na, which is beta-radioactive with a half-life of 15.0 h. A sample of a material that contains sodium is placed in a thermal neutron beam whose flux is 2.0 × 1018 neutronsm2 . s for 1.00 h. The activity of the sample is then 5.0 µCi. How much sodium was present in the sample? (This is an example of neutron activation analysis, a very sensitive technique.)

Reference no: EM131011317

Questions Cloud

How did athens be become a democracy : Why did Sparta institute such strict military controls?
Explain your ideas in your initial post : Explain your ideas in your initial post. Then agree or disagree with at least two other posts by your classmates, and explain why.
What problems may be encountered by a nonprofit : What is UBIT? What problems may be encountered by a nonprofit that has UBIT?
Position of the fermi level in intrinsic semiconductors : Assume that the density of states is the same in the conduction band (C8) and m the valence band ( V8). Then, the probability that a state is filled at the conduction band edge (Ee) is equal to the probability that a state 1s empty in the valence..
How much sodium was present in the sample : A sample of a material that contains sodium is placed in a thermal neutron beam whose flux is 2.0 × 1018 neutronsm2 . s for 1.00 h. The activity of the sample is then 5.0 µCi. How much sodium was present in the sample? (This is an example of neutr..
Estimate the change in the amount of metal in the can : Derive an equation using differentials to estimate the change in the amount of metal in the can as a function of a change in the wall thickness.
Implementation of a service-based continuing education : You are tasked with developing a proposal to cover expenses associated with implementation of a service-based continuing education training department
Set up the intgeral for finding the work done in pumping : A cylindrical tank of radius 3ft and height 10ft is filled with 2ft of a liquid whose density is 40lb/ft3. Set up the intgeral for finding the work done in pumping all the liquid through a 2ft pipe sticking out of the top of the tank.
Calculate the lowest possible energy : An electron is confined to a 1 micron layer of GaAs. Assuming that the semiconductor can be adequately described by a one-dimensional quantum well wi th infinite walls, calculate the lowest possible energy within the material in units of electron ..

Reviews

Write a Review

Chemistry Questions & Answers

  What is the ph after 0.0012 mol

Question- A buffer that contains 0.135 M acid, HY, and 0.228 M of its conjugate base, Y-, has a pH of 8.78. What is the pH after 0.0012 mol of Ba(OH)2 is added to 0.355 L of this solution?

  Explain ammonium nitrate occurs spontaneosly in water

The dissolution of ammonium nitrate occurs spontaneosly in water 25 degrees celcius. As NH4NO3 dissolves, the temperature of the water decreases. What are the signs of Delta H, Delta S, and Delta G for this process

  Fluorine-18 undergoes positron emission with a half-life

fluorine-18 undergoes positron emission with a half-life of 1.1x102 minutes. if a patient is given a 248mg dose for a

  State what is contained in each bottle and make a flow chart

A worker in the stock room notices that the labels have fallen off of 5 bottles. the lablels read benzaldehyde, 2-hexanone,pentanal, cyclohexanol, and 2-hexanol. devise a procedure to determine how to eliminate what is contained in each bottle and..

  Compute the molar repulsion energy

Compute the molar repulsion energy between two nitrogen's nuclei if they are separated by 1.1 Angstroms assume that no electrons are present.

  Explain the soil in order to make it more acidic

Some plants require acidic soils for healthy growth. Which would be more productive to add to the soil in order to make it more acidic, Fe2(SO4)3 or Na2SO4, and why

  Compute the maximum non-expansion work

Calculate the maximum non-expansion work that can be done on the surroundings from the combustion per kilogram of H2(g) at constant pressure and 298.15K.

  Explain similar structure but different volume and mass

At low temperatures, xenon freezes to a solid having a density of 5.653 g/cm3. Below 84 K, argon also freezes to a solid that has a similar structure but different volume and mass.

  Explain why it leads to inversion of the configuration

Most of the product is formed by anSN2 reaction. Give a mechanism for the reaction showing the transition state and explain why it leads to inversion of the configuration and give a perspective formula and a name of the main product of this reacti..

  Oxygen makes up 467 by mass of the earths crust how many

oxygen makes up 46.7 by mass of the earths crust. how many grams of oxygen are present if a sample of the crust has a

  Explain which reagent is used in excess

Which reagent is used in excess? How great is the molar excess (how many times greater)? I'll add the procedure images in the comments

  Complete the following table compound massmoles

Complete the following table: Compound Mass Moles

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd