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Korvikt [17]
3 years ago
14

Of Ne

Chemistry
1 answer:
babunello [35]3 years ago
8 0
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How many particles are in 2.0 moles of CH4
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What is the pOH of a solution with [OH-] = 1.4 x 10-13?
lukranit [14]

Answer:

C. 12.85

Explanation:

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4 0
3 years ago
FIRST ANSWER = BRAINLIEST
STALIN [3.7K]

A_{r} = 24.3

The average atomic mass of X is the <em>weighted average</em> of the atomic masses of its isotopes.  

We multiply the atomic mass of each isotope by a number representing its <em>relative importance</em> (i.e., its % abundance).  

Thus,  

0.790 × 24 u = 18.96 u

0.100 × 25 u =   2.50 u

0.110 × 26 u =    <u>2.86 u</u>  

       TOTAL =  24.3   u

∴ The relative atomic mass of X is 24.3.


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How is this model useful?
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I'll mark brainliest!! :)
Viefleur [7K]
I believe the answer is C, AgBr. I hope this helps
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