What mass of water forms when 2.75 104 mol NaOH reacts completely?

Answer 1

To make water using NaOH, you can react it with an acid, such as HCl. The reaction is
NaOH + HCl ---> NaCl + H2O. 2.75x10^4 moles of NaOH will produce 2.75x10^4 moles of water because the ratio of NaOH to H2O is 1 to 1 (see equation). Thus, the mass of water formed will be
2.75x10^4 moles H2O x 18 g/mole = 4.95x10^5 grams of water (495 kg)

Answer 2

The balanced chemical equation for the reaction of NaOH with water is 2NaOH + 2H2O -> 2Na+ + 2OH- + 2H2O. Therefore, for every mole of NaOH, 1 mole of water is formed. In this case, 2.75 x 10^4 mol of NaOH will form an equal amount of water, which is 2.75 x 10^4 mol of water.