Answer : The mass of 0.50 moles of Na is, 11 grams
Explanation : Given,
Moles of Na = 0.50 mole
Molar mass of Na = 22.99 g/mole
Formula used :

where,
n = number of moles of Na
w = mass of Na
M = molar mass of Na
Now put all the given values in this formula, we get the mass of Na.


Therefore, the mass of 0.50 moles of Na is, 11 grams