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natta225 [31]
3 years ago
11

if you pour out some of the water in a bucket,does the density of the remaining water change? explain.

Chemistry
2 answers:
Aleksandr [31]3 years ago
5 0
The density does not change because it is still the same liquid as before
Fynjy0 [20]3 years ago
3 0
Yes, because if you assume that you have a full bucket of water and when you try to pick it up, it too heavy to pick up without a struggle so when you pour half the water out of the bucket, the bucket of water is a lot easier to pick up, thus the density of the bucket of water changes.
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4. DBearded waste of Co-60 must be stored until it is no longer radioactive. Cobalt-60
Bingel [31]

464 g radioisotope was present when the sample was put in storage

<h3>Further explanation</h3>

Given

Sample waste of Co-60 = 14.5 g

26.5 years in storage

Required

Initial sample

Solution

General formulas used in decay:  

\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}

t = duration of decay  

t 1/2 = half-life  

N₀ = the number of initial radioactive atoms  

Nt = the number of radioactive atoms left after decaying during T time  

Half-life of Co-60 = 5.3 years

Input the value :

\tt 14.5=No.\dfrac{1}{2}^{26.5/5.3}\\\\14.5=No.\dfrac{1}{2}^5\\\\No=\boxed{\bold{464~g}}

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