Please help. I figured out the first part but don't know the second part.
Suppose you start with a sample with 4.150×108 nuclei of a particular isotope.
This isotope has a half-life of 446 s. What is the decay constant for this particular isotope?
How many nuclei remain after 1.13×10^{3} s?
Please help. I figured out the first part but don't know the second part. Suppose you...
Figured out the first part and can't figure out the second - please help and show process! Part A What must the charge (sign and magnitude) of a particle of mass 1.43 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 680 N/C? Use 9.81 m/s2 for the magnitude of the acceleration due to gravity. View Available Hint(s -2.06x10-5 C Correct Part B What is the magnitude of an electric field in which...
The half-life of 52Mn is 5.59 days. (a) Convert the half-life to units of seconds. (b) What is the decay constant (in s−1) for this isotope? (c) Suppose a sample of 52Mn has an activity of 0.510 µCi. What is this activity expressed in the SI unit of becquerels (Bq)? (d) How many 52Mn nuclei are needed in the sample in part (c) to have the activity of 0.510 µCi? E. Now suppose that a new sample of 52Mn has...
I need some help figuring this one out and how to do it. 14.) One isotope of the radioactive element thorium is 227th, which undergoes a-decay according to the equation: 227Th → 223Ra + a. If the half-life of 227Th is 18.7 days, what is the rate of a- particle production, in a.s., from a sample of 510 ug of 22 Th? 227Th 227.0277 g.mol a. 5.0x1016 a:s! b. 5.8x1011 a.s -1 c. 5.8*108 a-s-1 d. 1.0x1012 a.s?
The first answer is correct, I just don't know how to get the second part. Please help me Suppose the maximum safe average intensity of microwaves for human exposure is taken to be 2.00 W/m^2. If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away must you be to be exposed to an average intensity considered to be safe? Assume that the power spreads uniformly over the...
please help me out with these questions, i need help. thank you in advance!! Question 2 (2 points) The radioactive decay of an isotope was measured for 1 week. The kinetics were modeled using a first order integrated rate law plot, such that In[amount of radioactive isotope remaining] was plotted on the y-axis and time was plotted on the x-axis. The data set was modeling using a linear equation, y=-0.542-1.92. In blank # 1, determine the rate constant for the...
Please show work. I need to know how you got your answers so i can learn to do it without Chegg. Thank you :) QUESTION 18 In balancing the nuclear reaction 238U = 234X + alpha particle, the identity of element X is ___________. cannot determine from the information provided thalium thorium uranium plutonium 1 points QUESTION 19 The decay of a radionuclide with a half-life of 4.3×105 years has a rate constant (in 1/years) equal to __________. 6.2×105...
please help I really dont know what the second M is suppose to be, but i want to say its the M of the ClO Part A Find CO32 of a 0.040 M M carbonic acid solution. Express your answer using two significant figures. VOAED ? CO,2 1- Request Answer Submit Part A Find CO32 of a 0.040 M M carbonic acid solution. Express your answer using two significant figures. VOAED ? CO,2 1- Request Answer Submit
Kate's Cards. Serial Problem 9. I've already figured out part one. Could I get help with parts two and three please? I've seen many different examples and none of them are making sense. SERIAL PROBLEM: KATE'S CARDS Kate's Cards (Note: This is a continuation of the Serial Problem: Kate's Cards from Chapters / through 8.) SP9. Kate's business is growing faster than she had predicted. In order to keep up, she will need to purchase improved computer hardware. Kate has...
please help with parts in case 1 and case 2! thanks you! Correct (100,0%) submit Find its decay constant in write the result in terms of 10 Keep 4 decimal places. 1.2327 Correct (100.046) Submit x10-7-1 Case 1: The mass of the initial radioactive sample is 6.20 kg. Some time after the initial sample was prepared, it was found that 0.447 kg radioactive materials has decayed. (h) What is the mass in kg) of the radioactive material that remains in...
I know the answer is not C. Can you help me out please?!? 18. If the cell is initially at standard-state conditions, which of the following statements is true? Volonter C1 NO- Znº NO, sa sa? Zn²+ (aq) + 2 H2n(s); E° =-0.76 V Cu²+(aq) + 2€ Cu(s); E° = 0.34 V A. Initially K. = 2 x 10-3), and it decreases with time. B. Initially K = 2 x 103, and it does not change with time. C. Initially...