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Assuming that this ammonia gas is at STP, you can use Avogadro's number to gind the number of moles of gas:

(387 x 1021 molecules) x (1 mol / 6.02x1023particles) x (17.03 g / 1 mol) =110 g NH3

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11y ago
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Q: HOW many grams pf ammonia are in 387x1021 molecules?
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