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How many atoms are present in each of the following samples? a) 0.386 mol of HO b) 5.48 g of SiO2 c) a mixture

How many atoms are present in each of the following samples? a) 0.386 mol of HO b) 5.48 g of SiO2 c) a mixture of 2.45 g of FeO3 and 1.81 g of NiO

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