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How many moles of aluminum oxide are present in a sample having a mass of 178.43g?
Wiki User
∙ 6y ago
For this you need the atomic (molecular) mass of Al2O3. Take the number of grams and divide it by the Atomic Mass. Multiply by one mole for units to cancel. Al2O3= 102 grams
408 grams Al / (102 grams) = 4.00 moles Al
Wiki User
∙ 15y ago
Wiki User
∙ 9y agoAluminum oxide has a molar mass of 101.961 grams per mole. 408 grams of aluminum oxide is equal to about 4 moles or 2.4089 E24 molecules.
Wiki User
∙ 11y agoThe molar mass of Aluminium hydroxide is 78 g/mol. Therefore there are 5.12 moles in 400 grams of aluminium hydroxide.
Wiki User
∙ 6y agoThe number of moles is 6,631.
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Since the density of aluminum is 2.7 g cm-3, a sample with a mass of 5.4 would have a volume of 2 cm3.
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1. Better chance of uniform sample. 2. Material for confirmations if needed.
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