Aluminum oxide, al2o3, is used as a filler for paints and varnishes as well as in the manufacture of electrical insulators. calculate the number of moles in 47.51 g of al2o3.

the number of moles in 47.51 g of Al2O3.

let M is the molar mass
and n the number of moles

we know that  M = m / n where m is the mass
so we can get n =m/M

M(Al2O3)=2*27+3*16=102

n=74.51/102= 0.46 mole

the answer is
0.46 mole

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