Asample contains 16.75 g of of the radioisotope u-236 and 50.25 g of its daughter isotope , th-232. how long did it take for decay to take place of one half-life of u-236 is 23 million years?

t = 45.5 million years

Explanation:

Initially whole sample is consisting the radioisotope

so initial total mass will be

now after some time we can say the radioactive nuclei is of mass

now we also know that half life is 23 million years

so we have

now we have

t = 45.5 million years

so above is the time interval

the average speed is 24.57 km/hr

1 a

2 b

3 b

4 d

5 d

6 d

explanation: