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yarga [219]
3 years ago
5

A mass spectrometer has determined the mass and abundances of all isotopes of an unknown element. The first isotope has a mass o

f 38.96amu (93.28%) and the second a mass of 40.96amu (6.72%). Calculate the average atomic mass and identify the unknown element, WRITE ONLY THE SYMBOL FOR YOUR ANSWER.
Chemistry
1 answer:
shepuryov [24]3 years ago
5 0

Answer:

I believe it is Potassium (K)

Explanation:

I did the math on a calculator and it was the closest atomic mass to potassium.

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First, we need to get moles of NaOH:

when moles NaOH = volume * molarity 

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from the reaction equation:

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