Calculate the half-life in days for the decay

Assignment Help Chemistry

Reference no: EM13697277

Problem- The radioactive decay of a certain sample produced 993 disintegrations per minute. Exactly 5.00 days later, the rate of decay was found to be 265 disintegrations per minute. Calculate the half-life, in days, for the decay of this sample.

Express your knowledge to solve the above question

Reference no: EM13697277

Questions Cloud

The final titrant volume from the correct initial titrant : Problem- E13G4. pKa of Carboxylic Acids. Errors in experimental procedures. Assume the volume of base in the buret was not at the 0.00 mL mark when you began the titration for benzoic acid. How might this have affected your results

Describe what an attribute or data member of a class : Analyze a basic set of requirements for a problem - Describe what an attribute or data member of a class - Distinguish between pass-by-value and pass-by-reference

Calculate the pressures p in atmospheres : Problem- Calculate the pressures, P, in atmospheres at which the mean free path, l, of a hydrogen molecule will be 4.00 ?m, 4.00 mm, and 4.00 m at 20.0 °C. The diameter of a H2 molecule is 270 pm.

What percentage of the sr-90 that was formed in detonation : What percentage of the Sr-90 that was formed in the detonation of the first fission bombs in August 1945 is still present in the environment in August 2055

Calculate the half-life in days for the decay : Problem- The radioactive decay of a certain sample produced 993 disintegrations per minute. Exactly 5.00 days later, the rate of decay was found to be 265 disintegrations per minute. Calculate the half-life, in days, for the decay of this sample.

Explain quantum mechanical description of the hydrogen atom : Problem- Briefly explain the Born-Oppenheimer approximation. Which terms of the Hamiltonian for a hydrogen molecule are affected by this approximation? Why is this approximation simplifying the quantum mechanical description of the hydrogen atom

Calculate the molecular weight of the unknown acid : Problem- Assume 0.20 g of a monoprotic acid was titrated with 14.55 mL of magnesium hydroxide base with a concentration of 0.140 M. Calculate the molecular weight of the unknown acid.

What is the ph of a 2.55 m concentration of this solution : Problem- The carboxylic acid, chloroacetic acid (ClCH2COOH), has a pKa of 2.87. What is the pH of a 2.55 M concentration of this solution

Explain the carboxyl group and amino group of alanine : Problem- Place each charge form of alanine under the pH condition where it would be the predominant form. The pKa values for the carboxyl group and amino group of alanine are approximately 2.3 and 9.7, respectively.

User Account

All Pages