For the chemical reaction 2NaOH+H2SO4⟶Na2SO4+2H2O what mass of sodium sulfate is produced from 1.17 mol of sodium hydroxide?

Answer 1

83.1 grams. For every mole of NaOH, you produce 0.5 moles of Na₂SO₄. So 1.17/2=0.585 moles Na₂SO₄. Multiply this number by the molar mass of Na₂SO₄, and you arrive at 83.07=83.1 grams to three significant figures.