If 48.4 L of H, reacted with 24.2 L of O, at STP, what is the volume of the gaseous water collected (assuming that none of it condenses)?
2H2(g) + O2(g) → 2H2O(g)

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explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

answerambulatory;