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Given the following reaction N2H4 -> 2H2 + N2 how many moles of H2 will be produced if 4.00 moles of N2H2 react?

How many moles of caffeine are there in 488.0 g of caffeine?

45.0 grams of F2 react according to the following balanced chemical equation: F2 + 2Nal -> l2 + 2NaF. As a result of this reaction ___ grams of l2 are produced.

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