Answer:
13.994 grams
Explanation:
Using the given balanced equation: 2Na + 2H2O → 2NaOH + H2
Calculate the molar mass of NaOH:
Na: atomic mass = 22.99 g/mol
O: atomic mass = 16.00 g/mol
H: atomic mass = 1.01 g/mol
Molar mass of NaOH = (1 * Na) + (1 * O) + (1 * H) = 22.99 + 16.00 + 1.01 = 40.00 g/mol
Determine the number of moles of Na:
Given mass of Na = 8.0465 g
Number of moles of Na = mass / molar mass = 8.0465 g / 22.99 g/mol = 0.35015 mol
Use stoichiometry to convert moles of Na to moles of NaOH:
According to the balanced equation, 2 moles of Na produce 2 moles of NaOH.
Number of moles of NaOH = 0.35015 mol * (2 mol NaOH / 2 mol Na) = 0.35015 mol
Convert moles of NaOH to grams:
Mass of NaOH = number of moles of NaOH * molar mass of NaOH = 0.35015 mol * 40.00 g/mol = 13.994 g
Using 5 significant figures, the mass of NaOH that can be produced from 8.0465 g of Na is approximately 13.994 g.