# In 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g), the hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 200 mL measured at 1.00 atm. What is the number of grams of sodium used? Vapor pressure of water at 25°C = 0.0313 atm.

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Jun 24, 2018

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We need to assess the molar quantity of gas...we get approx.

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….for which we use the Ideal Gas equation...

We have SUBTRACTED

And we assess the reaction...

And thus there are 2 equiv of sodium metal...

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