Question

How many grams of sodium hydroxide is needed to react with 100 ml of a 1.4 M nitric acid for complete neutralization to happen.

Answer 1

NaOH + HNO3 ==> NaNO3 + H2O

mols HNO3 = M x L = ?
mols NaOH = mols HNO3 (look at the coefficients in the balanced equation.)
mols NaOH = grams/molar mass

Answer 2

39.997 g/mol