The number of moles of aluminum for 1.204 x 0²³ atoms of aluminum is 0.2 moles. Hence, The correct answer is Option (A)
What is the mole concept ?
Mole is defined as the amount of the substance containing the same number of discrete entities (atoms, molecules, ions, etc) as there are atoms in a sample of pure 12C weighing exactly 12g.
The number of particles present in one mole of any substance = Avogadro Number = 6.023 x 10²³.
Formula to calculate Mole when number of particles is given ;
n = given number / 6.023 x 10²³
n = 1.204 x 10²³ / 6.023 x 10²³
n = 0.2 moles
Therefore, The number of moles of aluminum for 1.204 x 0²³ atoms of aluminum is 0.2 moles. Hence, The correct answer is Option (A)
Learn more about Mole concept here ;
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