Explain how to measuring nuclear radioactivity

Reference no: EM13492466

The curie (Ci) is a commonly used unit for measuring nuclear radioactivity: 1 curie of radiation is equal to 3.7 1010 decay events per second (the number of decay events from 1 g of radium in 1 s). (a) What mass of Na238SO4 has an activity of 10.0 mCi? Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 h. Answer in ng (b) How long does it take for 99.99% of a sample of sulfur-38 to decay?

Reference no: EM13492466

Questions Cloud

Determine the center-of-mass coordinate : The density of a 3.61 m long rod can be described by the linear density function lambda(x) = 103 g/m + 10.3x g/m^2. determine the center-of-mass coordinate

Determine the velocity of the sports car : In a parking lot, an SUV of mass 2000 kg driving at 5 m/s collides head on with a sports car of mass 1000 kg driving in the opposite direction. Determine the velocity of the sports car before the collision

What is their final speed when they hit the ground : A ball is thrown upward at 20 m/s from the top of a building, which is 100 meter high. Another ball is thrown downward from the top of the building at 15 m/s. What is their final speed when they hit the ground

Find the internal resistance of the electromagnet : You have a small electromagnet that consumes 300 W from a residential circuit delivering 120 V at 60.0 Hz. find the internal resistance of the electromagnet

Explain how to measuring nuclear radioactivity : The curie (Ci) is a commonly used unit for measuring nuclear radioactivity: 1 curie of radiation is equal to 3.7 1010 decay events per second (the number of decay events from 1 g of radium in 1 s).

Explain the half-cell potential for the reduction of o2 : Given that the partial pressure of O2 in the atmosphere is 0.20 atm and the concentration of H3O+ is 2.0 x 10-6 M, determine the half-cell potential for the reduction of O2 according to the reaction: O2 + 4 H3O+ + 4 e- ? 6 H2O E° = 1.229 V

Evaluate the frequency of the photon emitted by a hydrogen : Calculate the frequency of the photon emitted by a hydrogen atom when its electron droops from the n=3 state to the n=1state

Explain the missing particle in the equation : Identify the missing particle in the following equation: 238:92 U --> 4:2 He + ? a) 242:94 Pu b) 234:90 Th c) 242:90 Th d) 234:92 U E) None of these

Explain dominant at physiological ph and formic acid : modify the 3 molecules so that they show the form that is dominant at physiological pH: formic acid, acetylsalicylic acid (aspirin), and citric acid

User Account

All Pages