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arlik [135]
2 years ago
9

How many valence electrons do the noble gases possess?

Chemistry
1 answer:
8090 [49]2 years ago
6 0

Answer:

Have no valence electrons because they are stable.

Thank you.

BY GERALD GREAT

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At the beginning of an experiment, a scientist has 176 grams of radioactive goo. After 165 minutes, her sample has decayed to 5.
Paul [167]
The half-life equation is written as:

An = Aoe^-kt

We use this equation for the solution. We do as follows:

5.5 = 176e^-k(165)
k = 0.02
<span>What is the half-life of the goo in minutes? 
</span>
0.5 = e^-0.02t
t = 34.66 minutes <----HALF-LIFE


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G(t) = 176e^-0.02t

How many grams of goo will remain after 50 minutes? 

G(t) = 176e^-0.02(50) = 64.75 g
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3 years ago
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bogdanovich [222]
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3 years ago
A speed time graph shows that a car moves at 20 m/s for 15s. The car's speed steadily decreases until it comes to a stop at 40s.
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Vilka [71]

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Hope this will help u mate :)

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According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of th
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