Calculate the half-life

Assignment Help Chemistry
Reference no: EM13716853

Question - The rate constant for the decay of As-72 is 0.0266 hr-1. If one starts with a 0.200-g sample, calculate...

A) the sample mass remaining after one day.

B) the time required for 70% of the sample to decompose.

C) the half-life

Any assist is greatly appreciated!

Reference no: EM13716853

Questions Cloud

What is the larger charge on the spheres : Two small non conducting spheres have a total charge of 89.7 µC. When placed 1.08 m apart, the force each exerts on the other is 11.8 N and is repulsive. What is the (larger) charge on the spheres
What is the anticipated mass : A current of 12 Ampere runs through the Parallel Wire Apparatus. What is the anticipated mass
Define species undergoing reduction : According to the following cell notation, which species is undergoing reduction? Sn | Sn2+(aq) || Mn2+(aq) | MnO2(s) | Pt(s) a) Mn2+(aq) b) Sn2+(aq) c) Sn(s) d) MnO2(s) e) Pt(s)
Evaluate how far the first bright diffraction fringe : Light of wavelength 640nm falls on a slit that is 3.80 x 10-3 mm wide. How far the first bright diffraction fringe is from the strong central maximum if the screen is 13.0maway
Calculate the half-life : The rate constant for the decay of As-72 is 0.0266 hr-1. If one starts with a 0.200-g sample, calculateA) the sample mass remaining after one day.
Determine what the width of the slit : When blue light of wavelength 440nm falls on a single slit, the first dark bands on either side of center are separated by 45.0 degrees. Determine the width of the slit
Find what the coefficient of static friction : A 30.0-kg block is initially at rest on a horizontal surface. A horizontal force of 76.0 N is required to set the block in motion, Find the coefficient of static friction between the block and the surface
Find the angular width of the central diffraction peak : If 640-nm light falls on a slit 0.0525mm wide, what is the angular width of the central diffraction peak
Define the electrode has an ideal nernstian slope : The SO42- residue is brought to a volume of 500 mL with water. This solution gives 269.2 mV in a cell with a SO42- ion selective electrode. 25.0 mL of this solution is then mixed with 10.0 mL of 4.00x10-5 M Na2SO4, and the cell then shows 255.3 mV..

Reviews

Write a Review

Chemistry Questions & Answers

  Explain how many cubic feet of liquid water in tank

A 2.5-ft3 tank of water at 160 psia and 363.5 oF has how many cubic feet of liquid water in it? Assume that you start with 1lb of H20. Could it contain 5 lb of H2O under these conditions

  Explain the reaction of calcium oxide with the pollutant

The reaction of calcium oxide with the pollutant, sulfur trioxide, to produce calcium sulfate has been proposed as one way to remove the the SO3 from the smoke resulting from burning high sulfur coal (as in a power plant).

  State the equilibrium constant for the reaction

Predict the equilibrium constant for the 1st reaction given the equilibrium constants for the 2nd and 3rd reactions. CO2(g) + 3 H2(g) CH3OH(g) + H2O(g) K1

  Evaluate the partial pressure in atmospheres of each gas

Natural gas is a mixture of many substances, primarily CH4, C2H6, C3H8, and C4H10. Assuming that the total pressure of gases is 1.48atm and that their mole ration is 94:4, 0:1, 5:0.50, calculate the partial pressure in atmospheres of each gas.

  Define what is the percent-yield of h2

What is the percent-yield of H2 In the reaction below when an equimolar mixture of CH4 and CO2 with an initial total pressure of 20.0 atm reaches equilibrium at 1200. K, at which Kp = 3.548 x 106

  How many grams of potassium acetate must be added to acetic

How many grams of potassium acetate must be added to 2.5 L of 0.250 M acetic acid to obtain a buffer at pH = 4.26

  State what is the partial pressure of oxygen

A baby with a severe bronchial infection is in respiratory distress. The anethetist administers heliox a mixture of helium and oxygen with 92.3 % by mass O2. What is the partial pressure of oxygen being administered to a baby if atnospheric pressu..

  What mass of hcn and water would be produced

If 5.00 X 10^3kg each of ammonia, oxygen, and methane are reacted, what mass of HCN and water would be produced, assuming 100% yield?

  How many kilojoules of heat would be liberated

Problem- The molar heat of vaporization of acetic acid, HC2H3O2, is 24.3 kJ mol-1 at its boiling point. How many kilojoules of heat would be liberated by the condensation of 5.79 g of acetic acid

  Calculate the percent dissociation of hclo

Problem- In 2011, researchers showed that hypochlorous acid (HClO) generated by white blood cells kills bacteria. Calculate (Ka)=2.9X10^-8 the percent dissociation of :( A). 0.40 M HClO, (B) 0.035 M HClO

  Explain what is the theoretical yield of iron in moles

combining 0.228 mol of FecO3 with excess carbon produced 13.2g of Fe. Fe2O3 + 3C -> 2Fe + 3CO what is the actual yield of iron inn moles? what is the theoretical yield of iron in moles? what is the percent yield

  Explain how many lone pairs are one the oxygen atom

write Lewis structure for Oxygen difluoride, OF2. How many lone pairs are one the oxygen atom

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