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What mass of aluminum is produced by the decomposition of 5.0 kg Al2O3?

My answer is 3000 g of Al
Do you convert kg to g?
5.0kg---> 5000g???

mol mass of Al2O3 = 2*27 + 3*16 = 54+48 = 102

fraction of Al in compound = 54/102

so 5 (54/102) = 2.65 kg of Al in the 5 kg of compound

Yes, you are correct. To convert kilograms (kg) to grams (g), you multiply the value in kg by 1000. Therefore, 5.0 kg is equivalent to 5000 g, not 3000 g as you initially suggested.

Yes, you are correct. When converting from kilograms (kg) to grams (g), you multiply by 1000 because there are 1000 grams in one kilogram. So 5.0 kg is equal to 5.0 x 1000 = 5000 g. Therefore, the mass of aluminum produced is indeed 5000 g, not 3000 g as you initially mentioned. Thank you for catching that mistake!