You are holding a heterogeneous mixture but once the ice cubes melt the mixture will become homogeneous. A heterogeneous mixture is when you can see and separate the different parts of the item you have. A homogeneous solution is when you can't separate the item you have by physical means<span />
A time of 40.7 minutes is taken for 170 grams of element X to decay to 5 grams.
<h3>How to analyze a radioactive decay case</h3>
Let suppose that element X experiments a <em>simple radioactive</em> decay, that is, that the element X becomes gradually into another less radioactive stable element in time.
We know that decay behaves exponentially and follows this model:
(1)
Where:
- - Initial mass, in grams
- <em>t</em> - Time, in minutes
- <em>τ</em> - Time constant, in minutes
- <em>m(t)</em> - Current mass, in grams
The time constant can be described in terms of half-life (), in minutes, through the following expression:
(2)
If we know that , and , then the time needed for the decay is:
<em>τ ≈ 11.541 min</em>
<em>t ≈ 40.698 min</em>
A time of 40.7 minutes is taken for 170 grams of element X to decay to 5 grams.
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Answer:
<em>Answer is</em><em> </em><em>given</em><em> </em><em>below with explanations</em><em>. </em>
Step-by-step explanation:
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Answer:
$20
Step-by-step explanation:
$44 - $4 = 40
40 divided by 2=$20
Answer: 5
Step-by-step explanation:
sqrt of 100 = 10
10/2 = 5