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Question:

What mass of aluminum is produced by the decomposition of 2.55 kg of Al2O3?

answer in units of kg,

Answer:

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using molar masses 2.55 kg (2 mol Al)(26.98 g/mol) / (101.96 g/mol Al2O3) 1.3495 kg of Al your answer is rounded to 3 sig figs is 1.35 kg of Al

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