How much of the sample remains after three half-lives

Reference no: EM13704883

Problem 1- A sample initially contains 3.2 moles of a radioactive isotope. How much of the sample remains after three half-lives?

2- Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.35mg sample of Pu?236 to decay to 0.160mg?

Express your answers to two significant figures separated by comma.

Reference no: EM13704883

Questions Cloud

How old is the scroll : Problem- A researcher claims that an ancient scroll originated from Greek scholars in about 500 b.c. A measure of its carbon-14 decay rate gives a value that is 92 % of that found in living organisms.

How many excess electrons does the drop have : A spherical water drop, 1.70 um in diameter, is suspended in calm air owing to a downward-directed atmospheric electric field E = 442 N/C. How many excess electrons does the drop have

What was your average velocity during this time : A building is 45m long. You run along the front of the building on your way to try to catch a bus. What was your average velocity during this time

How long does it take the car to stop : A car is moving with a speed of 27m/s down a long straight road. When it is130m from a traffic light, the light turns red. How long does it take the car to stop

How much of the sample remains after three half-lives : Problem 1- A sample initially contains 3.2 moles of a radioactive isotope. How much of the sample remains after three half-lives. 2- Plutonium-236 is an alpha emitter with a half-life of 2.86 years. How long will it take for the 1.35mg sample of P..

Calculate your angular speed : Calculate your angular speed (in radians/sec) and your centripetal acceleration (meters per sec2) at 34 degrees north latitude because of the rotation of the Earth

What is the period of the longer pendulum : The period of a simple pendulum is 1.7 s. The length of the pendulum is doubled. What is the period T of the longer pendulum

Proteins often have regions that can fold and function : Problem- Proteins often have regions that can fold and function as an independent entity from the whole protein. These regions are called

What is the minimum distance from the line : The city is trying to figure out how long the traffic light should stay yellow at an intersection. what is the minimum distance from the line

User Account

All Pages