In the reaction 2naoh + h2so4 → na2so4 + 2h2o, 80 grams of naoh reacts with h2so4 to form grams of na2so4. fill in the blank. your 142 g 114 g 33.1 g 250 g need and if you know the answer can you explain it.

            Option-A, 142 g is the correct answer.

Solution:
Balance Chemical Equation is as follow,

                            2 NaOH  +  H₂SO₄    →    Na₂SO₄  +  2 H₂O

According to equation,

       79.98 g (2 mole) NaOH react to form  =  142 g (1 mole) of Na₂SO₄
So,
         80 g NaOH on reaction will produce  =  X g of Na₂SO₄

Solving for X,
                                X  =  (142 g × 80 g) ÷ 79.99 g

                                X  =  142.01 g of Na₂SO₄