# The Half-Life Of A Certain Isotope Is 2 Hours.If The Original Mass of Isotope was 12,000 Grams,How Many Grams Would Be Left After 1 Day?

##### 3 Answers

Here it is. After 24 hours, the mass of the isotope will be

#### Explanation:

At time zero you have 12,000 grams.

time 2 hrs, you will have

time 4 hours, you will have

time 6 hours, you will have

time 8 hours, you will have

time 10 hours, you will have

time 12 hours, you will have

time 14 hours, you will have

time 16 hours, you will have

time 18 hours, you will have

time 20 hours, you will have

time 22 hours, you will have

time 24 hours. you will have nearly

The mass is

#### Explanation:

The equation for the radioactive decay is

The initial mass is

The half life is

The radioactive constant is

Therefore,

The time is

Therefore,

I get

#### Explanation:

From here, If

The half-life of this substance is

So, after

Multiplying that by the original mass, there will only be

Therefore, there will only be