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How many grams of N2O, nitrous oxide, are contained in 500. mL of the gas at STP
Zheng He
A Chinese mariner, explorer, diplomat, and fleet admiral who commanded expeditionary voyages to Southeast Asia, the Middle East, and East Africa from 1405 to 1433.
Borderland
A region near or along a border that often embodies a blend of cultures, identities, and political tensions.
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