Question

Does anyone know how calculate half-lives in chemistry that can help me ? Please and thank you if so msg me thanks.

Answer 1

when t=t(1/2):
A=A initial/2
for 1 order:
t(1/2)=0.693/k.

Answer 2

what is the half-life of the new isotope ? and

how much of the sample had decayed after 8 minutes ?

Answer 3

i guess its 4 mins nd 0.9 gms

Answer 4

I tried doing one but idk if its correct can you check it for me ?

Answer 5

I tried doing these two on my own . I'm not sure if its correct though.

Answer 6

this is some hard shiii (t)

Answer 7

what about this . Identify the structure below ? I thought it was cyclopropane but not sure am I right ? Need Help thanks

Answer 8

your right its cyclo

Answer 9

Really ? .. thanks

Answer 10

any second opinion by anyone else ?on the above questions ?

Answer 11

Wait wait wait.

is just propane.

Answer 12

cyclopropane:

Answer 13

OOOOOO ok . I see the difference . thank you . Do you understand any of the above questions ?

Answer 14

You mean the half-life one?

Answer 15

What differential equation are you solving in order to derive that decay law?

Answer 16

Krissy I really don't know how to calculate it. That's all they gave me . & Frostbite everything that I post is the only thing they gave me to work with .

Answer 17

Well more easy to handle each question separately:
I start by describing some terms:

The radioactive decay law:
An exponential function law that describe how the amount of atoms well be removed
as a function of the time due to radioactive decay:

Half-life: A exponential function has a time called the half-life. The half-lige is a measure of how long time there will go before 50% of the atoms have decayed. If I had to draw it: