Answer is 1.25, but I am not sure how to do it
Answer is 1.25, but I am not sure how to do it Radon-222 undergoes a decay...
After 3 days a sample of radon-222 decayed to 58% of its original amount. How long would it take the sample to decay to 25% of its original amount? Select the correct answer. O t = 11.45 days t = 32.53 days t = 2.54 days t = 7.63 days Ot - 5.09 days none of those
How long will it take for the radioisotope Rn-222 to decay to 54.2 g if the half-life of Rn-222 is 3.8235 days, starting with the following. (Isotopic mass of Rn-222 is 222.017570 g/mol.) ( (a) 80.6 g Rn-222 (b) 10.6 mol Rn-222
A fossil was dated using rubidium-87, which undergoes beta decay and has a half-life of 4.75x1010 years. Calculate the age of the fossil if (5.7x10^1)% of rubidium-87 remains in the sample. Report your answer with 2 significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: X10 Answer units Question 2 (1 point) Thallium-201 is used to diagnose heart disease. The half-life of thallium-201 is 72.9 hours. If a patient takes 7.7 ug,...
please show all formulas/work 5. The decay constant of a radioactive source is 0.300/minute. - How much time must elapse before the activity is reduced to… (a) 85%? (b) 25%? (c) 5%? B) The half-life of a radioactive source is 14.0 minutes. - How much time must elapse before the activity is reduced by… (a) 70%? (b) 45%? (c) 20%? C) Radon-222 has a physical half-life of 30.0 days. A 10.24 microgram piece of this source is placed in storage....
just give me the answer i dont need an explanation When the nuclide radium-226 undergoes alpha decay: The name of the product nuclide is The symbol for the product nuclide is Submit Answer Retry Entire Group 6 more group attempts remaining Fill in the nuclide symbol for the missing particle in the following nuclear equation He + BOTH Write a balanced nuclear equation for the following: The nuclide bismuth-214 undergoes alpha emission. (Use the lowest possible coefficients.) When the nuclide...
I am not sure how to do this. How do you know if a series of function converges uniformly? How to prove this? 6. Prove that the series Š(- 1) converges uniformly in every bounded interval, but does not converge absolutely for any value of x.
I am not sure how to answer this question A concentration cell is built based on the reaction: 2H+ + 2 + H2 The pH in one of the half cells is -0.2945, while the pH in the other is 2.924. If the temperature of the overall cell is 287 K, what is the potential? (Faraday's constant is 96,485 C/mol e) Submit Answer Tries 0/45
Can someone please show me how to do this? I feel like I did something wrong. 10. The half life of radioactive 32P is 14.3 days. How long does it take for 100 mg of this isotope to decay to 5 mg? 093 h@)-.k, n(100
I am not sure how to approach this question I think I have the correct answer for number 1 but I am not exactly sure how to apply it to number 2 if number 1 is correct. 1. What is the best range of buffering that is provided when a weak acid is present in a water solution? the best range of buffering that is provided when a weak acid is present in a water solution is a pH of...
I am not sure how to do this. · The average mass of nitrogen from air is 82=2.310109 g, with a standard deviation of s1= 0.000143 (for n1=7 measurements). The average mass from chemical sources is X2= 2.299472 g, with a standard deviation of s2=0.001379 (for n2=8 measurements). Are the two masses significantly different?