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carrieaj08
24.09.2020 •
Chemistry
(2.) Calculate the sum of the ionic charges in the compound Al2O3.
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Ответ:
It involved knots in strings called quipu. The quipu was not a calculator, rather it was a storage device. Remember that the Incas had no written records and so the quipu played a major role in the administration of the Inca empire since it allowed numerical information to be kept.