The time needed for a substance becomes half of it mass is called half-time, after. In this case, the half time is 100 minutes. Then to know how much substance remain after 200 minutes the equation would be:

Substance remains= 1/2^(time/half-time) x substance initial mass
Substance remains = 1/2^(200 minutes/100minutes) x 1 times= 1/4 times

6 0

4 years ago

What is the formula for the compound iron (iii) sulfate?

xeze [42]

The Iron (III) ion is $Fe^{3+}$
The sulfate ion is $SO _{4}^{2-}$

Thus when forming the compound iron (iii) sulfate you would need three sulfate ions bonded to two iron ions in order to fill the valency requirement

∴ the formula would be Fe₂(SO₄)₃

Whenever you are adding a number to a radical you must bracket it.

5 0

3 years ago

Read 2 more answers

Match each element of poetry with the correct expert

zzz [600]

Answer:

is there a picture of the problem

Explanation:

6 0

3 years ago

Read 2 more answers