Answer : The mass of [tex]Na_2S[/tex] is, 269.9 grams.
Explanation : Given,
Moles of sodium sulfide = 3.46 mol
Molar mass of sodium sulfide = 78 g/mol
Formula used :
[tex]\text{ Mass of }Na_2S=\text{ Moles of }Na_2S\times \text{ Molar mass of }Na_2S[/tex]
Now put all the given values in this formula, we get:
[tex]\text{ Mass of }Na_2S=(3.46moles)\times (78g/mole)=269.9g[/tex]
Therefore, the mass of [tex]Na_2S[/tex] is, 269.9 grams.
