Two compounds containing six carbon atoms on treatment with <span>either with BH</span>₃<span> in THF followed by H</span>₂<span>O</span>₂<span> /OH</span>⁻<span> (OR) with H</span>₂O <span>/ Hg</span>²⁺<span> / H</span>₃O⁺ gives the same products.
The two alkynes, their two different types of reactons and products are given below,
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Number of atoms : 1.26 x 10²³
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
0.21 moles of Al, so n = 0.21
Number of atoms :

342.14 g/mol
Molar mass of Al= 26.98
Molar mass of S=32.06
Molar mass of O=16.00
(26.98)2+(32.06+(16.00×4))3=342.14
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