.023 kg
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The molar ratio of Na to O2 in the reaction 2Na + O2 -> 2Na2O is 2:1. This means that for 23g of Na, we need half as many grams of O2, which is calculated as 23g * (1/2) = 11.5g of O2.
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1 kilogram = 1000 grams 1 gram = 0.001 kilogram
Kilogram and Kilo refer to the same unit of measurement.
A kilogram is bigger than a pound. 1 kilogram is equivalent to approximately 2.2 pounds.