How many moles of atom are contained in 9.0g of aluminum?
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Hey mate......
Aluminum molecular mass = 26.982 grams.
This refers that 1 mole of aluminum is equal to 26.982 grams of aluminum.
Then, No. of moles in 9 grams of aluminum is determined by the ratio of the mass of aluminum to the atomic mass of aluminum.
= 9/ 26.982
Moles of aluminum = 0.333 moles
so, the No. of moles of atoms present in 9 grams of aluminium is 0.33 moles. This refers that one third of a moles of atoms is contained in 9 g of aluminum.
No. of atoms in 9 g of aluminum = No of moles × Avogadro number
= 0.33 X 6.028 X 10 ^23
No. of atoms in 9g of aluminum
= 2.011 X 10 ^ 23 atoms
hope it helps you....
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