CHEM 1034 Ex 03 writing (Ver B) Name - (20pt each, online 2pt each) 1. A sample

Question

CHEM 1034 Ex 03 writing (Ver B) Name - (20pt each, online 2pt each) 1. A sample of radioactive Co-62 was found to have a half-life of 23.83 d. What fraction of the sample will still be Co-62 after 3 week? Assume radioactive decay to follow first-order kinetics 10y! at 115°C. What is 2. The rate constant for a particular reaction is 1.7 the activation energy for the reaction, in kJ/mol 10y at 25 C and 5.2 You as manager of the NOCl project are in charge of the reaction of 2 NO (g) + Cl; (g) 2 NOCI (g). You told the 3. team that the reaction --56.0 kJ and attention to the temperature of reaction and bumped the reaction temperature to 250 C. Please explain what will happen now 1) the reaction 2) your bonus, 3) your job, AS--1 17.0 J/K at 125 . One day one of your workers wasn't paying

Explanation / Answer

Ans 1 :

The half life period of the element is calculated using the formula :

Nt = No (1/2)t / t 0.5

Nt is the final amount of sample

No is the initial amount of sample

t is the amount of time lapsed

t 0.5 is the half life period of sample

So let the initial amount of sample be 100 g

Nt = 100 (1/2)21 / 23.83

Nt = 54.29 g

So the amount of sample left after 3 weeks will be 54.29 grams.

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---