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Marat540 [252]
3 years ago
11

Mr. Avogadro has 20 grams of radioactive Pa-234. How many atoms of Pa-234 does Mr. Avogadro have? PLEASE HELP WILL MARK BRAINLIE

ST!!
Chemistry
2 answers:
jolli1 [7]3 years ago
6 0

Answer:

The number of atoms in 20 grams of Pa-234 is 5.14 ×10²² atoms

Explanation:

Given that the molar mass of Pa-234 (protactinium) is 234.04331, we have

The number of moles of protactinium in 20 grams of Pa-234, we have

Number of moles = Mass/(Molar mass) = 20/234.04331 = 0.0855 moles

One mole of Pa-234 contains 6.02×10²³ atoms, therefore, we have;

0.0855 moles of Pa-234 contains 0.0855× 6.02×10²³  = 5.14 ×10²² atoms

Therefore, the number of atoms in 20 grams of Pa-234 = 5.14 ×10²² atoms.

Veronika [31]3 years ago
4 0
Call my dogs are equals two nothing but air but it’s OK because nothing I’ll call dogs carbon dioxide is something you need in your life so you might do that. Put so common dioxide equal to XY think but it doesn’t matter because it is air thank you very much
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