The half-life of Th-232 is 1.4E10. Find the number of disintegrations per hour emitted by 1 mol of Th-232.

Answer 1

1.4E10 what unit? days, hours, seconds?

Answer 2

k = 0.693/t_1/2 = approx 4.95E-11

Rate at time zero = k*N and for 1 mol Th, N will be 6.02E23 atoms.
Solve for R, which will be in disintegrations/year . Convert that to d/hour.

Answer 3

years

Answer 4

The assumption for my response was years.