How many grams of sodium are needed to produce 6.44 L of hydrogen gas according to the following reaction at 25 °C and 1 atm?
sodium (s) + water(l)sodium hydroxide (aq) + hydrogen(g) ___ g Na.
nH2 = 1*6.44/0.0821*298 = 0.263 mol H2
Balance the equation
2 Na + 2 H2O =====> 2 NaOH + H2
0.263 mol H2 * 2 mol Na / 1 mol H2 = 0.526 mol Na * 23 g / mol = 12.11 g Na
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