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Caffeine Lab Record/Data: Weight of tea bag = 2.3643g Weight of tea used = 2.3643g *3 = 7.0929g Filter flask weight = 79.1895g Crystals in filter flask = 79.3601g Caffeine recover = 79.1895g – 79.3601 = 0.1706g Caffeine recovered per bag of tea = 0.1706g / 3 bags = 0.0569g (1000mg/1g) = 56.9mg Melting point.