(Answered) How do i calculate the volume of dry hydrogen gas would

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How do I calculate the volume of dry hydrogen gas would occupy at STP. (use the combined gas law)

The mass of pure magnesium is 0.030g

Volume of h2 collected is 28.31ml

Temperature of h2 collected was at 19.9

Barometer reading was 29.99 in

Vapor pressure of water at observed temperature was 17.5 mm hg

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