What were some of the “time bombs” being experienced by the states under the articles of confederation?

The "time bombs" being experienced were the risk of chaos as there was no central power with the federal government and states could have broken to their own. Because of the decentralization of power it was very difficult to collect taxes and keep the government going smoothly, the trade was difficult between various states and all of these were real threats at that time.

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tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.