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Aliun [14]
3 years ago
14

Select all that apply. The stability of atomic nuclei is related to the _____.

Chemistry
1 answer:
ohaa [14]3 years ago
8 0
Neutrons and protons
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Nataly_w [17]

Answer:

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Uranium has three common isotopes. If the abundance of 234U is 0.0054%, the abundance of 235U is 0.7204% and the abundance of 23
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Answer:

237.9 amu

Explanation:

Given data:

Abundance of U-234 = 0.0054 %

Abundance of  U-235 = 0.7204%

Abundance of  U-238 = 99.2742%

Average atomic mass = ?

Solution:

Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass  / 100

Average atomic mass = (0.0054×234)+(0.7204×235) +(99.2742×238)  /100

Average atomic mass =  1.2636+ 169.294+ 23627.2596 / 100

Average atomic mass = 23797.8172/ 100

Average atomic mass = 237.9 amu.

7 0
3 years ago
Where is the oldest rock layer in the dome?
xeze [42]

Answer:

the oldest rocks are in the center of the dome structure.

Explanation:

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A student requires 2.00 L of 0.100 M NH4NO3 from a 1.75 M NH4NO3 stock solution. What is the correct way to get the solution?
defon

To solve this we use the equation,

 

M1V1 = M2V2

 

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

 

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The validity of documents was marked by fingerprinting in what time period?
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Answer before the 1800s

Explanation:

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